Part No: RXSOL-40-4003-026

Seawater cooling dispersant for controlling marine fouling and maintaining heat-transfer performance. Keeping seawater cooling system free from marine fouling free from microbiological bacteria and fungi or macro biological.

RXSOL-40-4003-026 Seawater Dispersant SWD

Seawater Dispersant SWD for Marine Cooling Systems

RXSOL-40-4003-026 Seawater Dispersant SWD is a concentrated liquid dispersant designed for use in marine seawater cooling systems to help control marine fouling and prevent the adhesion of biological growth to seawater heat-transfer equipment.

Regular application helps disperse microbiological growth such as bacteria and fungi as well as macrobiological fouling such as mussels, plants and other marine growth, helping maintain seawater flow and heat-transfer efficiency.

Seawater dispersant is a highly effective dispersant for keeping seawater cooling system free from marine fouling. Keeping seawater cooling systems free from microbiological bacteria and fungi or macro biological.

Application

Where to use Sea Water Dispersant?

RXSOL Seawater Dispersant SWD is suitable for seawater cooling circuits used in marine and offshore equipment, including:

Main engine seawater cooling systems
Auxiliary engine cooling systems
Central cooling systems
Marine heat exchangers
Seawater condensers
Cooling-water pipelines
Sea chests and associated cooling-water circuits
Marine heat-transfer equipment
Offshore seawater cooling systems

The product is intended primarily as a fouling-prevention/dispersant treatment. Existing heavy fouling should be mechanically or chemically removed before starting a preventive treatment program.

RXSOL Seawater dispersant SWD is a highly effective dispersant for keeping seawater cooling system free from marine fouling. Keeping seawater cooling systems free from microbiological (bacteria and fungi) or macrobiological (mussels, plants, etc.) growth is essential for maintaining the cooling capacity of today’s high efficiency systems. When used on a regular basis, RXSOL Seawater dispersant SWD prevents fouling by dispersing sea growth and preventing it from adhering to marine heat transfer equipment. RXSOL Seawater dispersant SWD does not contain any phenolics, chlorinated solvents or other harsh chemicals.

Dose

Recommended Dosage

The application procedure specifies:

Treatment concentration: 6 ppm
Treatment duration: 1 hour

For achieving approximately 6 ppm, the reference dosage is:

0.6 litre of product per 100 tonnes of seawater flow

The product can be introduced using a gravity head tank and flow meter, eductor dosing unit, or suitable pump-and-tank dosing system. The recommended injection point is immediately after the external sea-chest cooling-water strainer so that the product is properly dispersed throughout the seawater cooling circuit.

Recommended Treatment Frequency

Vessels operating continuously in coastal waters:

Dose approximately every 3 days.

Ocean-going vessels:
When operating in coastal waters, dose approximately every 2 days; when operating away from coastal waters, dose at least once per week.

Actual treatment frequency should be adjusted according to vessel operating conditions, seawater quality, fouling tendency and the vessel's water-treatment program.

It is recommended that the seawater cooling system be cleaned prior to beginning a prevention program featuring dispersant. The reason for cleaning is that if the cooling system is already fouled, the product will disperse new growth present but not existing growths.Therefore, to achieve the desired heat transfer condition,we recommend that all existing growth be removed.

Technical specifications

Typical Technical Specifications

Property	Typical Value
Product Name	Seawater Dispersant SWD
RXSOL SKU	RXSOL-40-4003-026
Physical Form	Liquid
Appearance	Clear, water-white liquid
Odor	Fresh, pleasant odor
Specific Gravity @ 25°C	0.989
Flash Point (PMCC)	None
pH	7.0-8.5
Water Solubility	Complete in all proportions
Recommended Treatment Concentration	6 ppm
Typical Treatment Duration	1 hour

Packing sizes

Supply location

Suitable for Marine Maintenance Programs

RXSOL-40-4003-026 Seawater Dispersant SWD can be incorporated into preventive maintenance programs for vessels where seawater cooling systems are exposed to persistent marine fouling.

Maintaining clean seawater cooling passages helps support:

Stable seawater flow
Effective heat transfer
Cooling-system performance
Reduced biological fouling
Reliable operation of marine heat-transfer equipment

Product Queries

What is RXSOL Seawater Dispersant SWD?

It is a concentrated liquid dispersant designed to help control biological and marine fouling in seawater cooling systems.

What does SWD remove?

SWD is primarily a dispersant and fouling-prevention treatment, rather than a heavy-duty cleaner. It helps disperse marine growth and prevent new growth from adhering to heat-transfer equipment.

Does SWD control bacteria and fungi?

Its application for controlling microbiological growth such as bacteria and fungi, as well as macrobiological growth such as mussels and plants.

Does SWD remove existing heavy fouling?

Not as a substitute for a dedicated cleaning operation. Existing heavy fouling should be removed before beginning a preventive SWD treatment program.

What is the standard SWD dosage?

The reference dosage is 6 ppm for one hour, equivalent to approximately 0.6 litre per 100 tonnes of seawater flow.

Where should SWD be injected?

The reference procedure recommends injection immediately after the external sea-chest cooling-water strainer to promote dispersion and mixing throughout the seawater cooling system.

Can SWD be used continuously?

Does not require continuous application. It provides periodic dosing recommendations based on whether the vessel is operating in coastal or ocean-going conditions.

Is SWD suitable for marine heat exchangers?

Yes. Its intended application is seawater cooling systems and marine heat-transfer equipment where biological fouling can affect cooling performance.

What is the pH of SWD?

The typical pH is 7.0-8.5, according to the reference technical data.

Is SWD water soluble?

Yes. The product is completely soluble in water.

Is SWD corrosive?

The product as non-corrosive to most metals. Material compatibility should nevertheless be confirmed for the specific cooling system and operating conditions.

What safety precautions should be followed?

Appropriate personal protective equipment should be worn when handling and dosing the product. Personnel should read the current RXSOL SDS before use and follow the vessel's chemical-handling procedures.

Product Identification

Brand: RXSOL
Product: Seawater Dispersant SWD
SKU: RXSOL-40-4003-026
Category: Sewage Chemicals Treatment-40 / Marine Water Treatment
Application: Seawater Cooling System Fouling Control
Primary Function: Marine Growth Dispersant & Fouling Prevention

RXSOL Seawater Dispersant SWD, RXSOL-40-4003-026, seawater cooling dispersant, marine cooling water treatment chemical, seawater cooling system treatment, marine fouling dispersant, sea chest treatment chemical, seawater heat exchanger fouling control, marine biological fouling control, ship cooling water chemical, seawater cooling treatment chemical, marine heat transfer equipment treatment, seawater dispersant supplier, marine chemicals supplier.

Seawater Dispersant SWD manufacturer supplier distributor in Mumbai, Kandla, Kolkata, Vizag, Chennai, India, Fujairah, Dubai, Sharjah, UAE, Gulf, Middle East, Muscat Barka Oman, Kenya Africa. Get the best quality of Seawater Dispersant SWD at a competitive price from us. We have ready stock of Seawater Dispersant SWD in India, UAE Gulf, Oman, Kenya Africa. Contact us for bulk as well as small orders.

Industrial area

Seawater Dispersant SWD – Frequently Asked Questions

1. What is Seawater Dispersant SWD?

Seawater Dispersant SWD is a liquid marine-growth dispersant designed to help prevent marine organisms from adhering to surfaces inside seawater cooling systems.

2. What is the main purpose of SWD?

The main purpose of SWD is to help keep seawater cooling systems free from microbiological and macrobiological growth, helping maintain efficient seawater flow, heat transfer and cooling capacity.

3. What types of marine growth does SWD help control?

SWD is designed to disperse new microbiological and macrobiological growth that can develop inside seawater cooling systems.

4. Does SWD remove existing marine growth?

No. SWD is a preventive treatment. It helps disperse new marine growth but does not remove established or existing fouling.

For systems with significant existing fouling, the cooling system should be properly cleaned before starting an SWD treatment program.

5. Why should the seawater cooling system be cleaned before using SWD?

Because SWD is primarily a marine-growth preventative, existing deposits and fouling should be removed first. Starting treatment on a heavily fouled system may reduce the effectiveness of the preventive program.

6. How does SWD help maintain cooling efficiency?

Marine growth can restrict seawater passages and accumulate on heat-transfer surfaces. Regular SWD treatment helps control new biological growth, supporting proper seawater circulation and heat-transfer performance.

7. How should SWD be dosed?

The reference application recommends dosing:

0.5 litres of SWD per 100 tonnes of seawater flow

The product should be introduced into the seawater cooling system for approximately one hour.

8. Where should SWD be introduced?

The product can be fed to the external sea chest using suitable dosing equipment such as:

Gravity tank with flow meter
Eductor dosing unit
Other suitable controlled dosing equipment

9. How long should each SWD treatment last?

The recommended treatment period is approximately one hour.

10. How frequently should SWD be dosed?

Treatment frequency depends on the vessel's trading and operating conditions.

Vessels operating continuously in coastal waters:
Dose approximately every 3 days.

Ocean-going vessels:
Dose approximately once per week during ocean passage and approximately every 2 days when operating in coastal waters.

11. Why is more frequent dosing recommended in coastal waters?

Coastal waters can have higher concentrations of marine organisms and biological activity. Therefore, seawater cooling systems may have a greater tendency toward marine growth, requiring more frequent preventive treatment.

12. Can SWD be used as a replacement for mechanical cleaning?

No. SWD is a preventive dispersant, not a substitute for cleaning heavily fouled cooling systems.

Existing marine growth should be removed using an appropriate cleaning procedure before starting the preventive SWD program.

13. Is SWD suitable for marine seawater cooling systems?

Yes. SWD is specifically intended for seawater cooling systems on marine vessels, where biological fouling can affect seawater flow and heat-transfer performance.

14. What are the key benefits of regular SWD treatment?

Regular treatment can help:

Prevent new marine growth from adhering to cooling-system surfaces
Control microbiological growth
Control macrobiological growth
Maintain seawater circulation
Support efficient heat transfer
Maintain cooling-system capacity
Reduce the tendency toward biological fouling

15. What is the basic SWD treatment procedure?

A typical treatment sequence is:

1. Clean the seawater cooling system if existing fouling is present.
2. Prepare the SWD dosing arrangement.
3. Calculate the required dosage based on seawater flow.
4. Dose at 0.5 L per 100 tonnes of seawater flow.
5. Introduce the product through the external sea chest.
6. Maintain dosing for approximately one hour.
7. Repeat treatment according to vessel operating/trading conditions.

16. Is continuous dosing required?

The supplied application information recommends periodic dosing rather than continuous dosing. The treatment interval should be selected according to whether the vessel is operating in coastal or ocean-going conditions.

17. What happens if the cooling system already has heavy marine fouling?

Existing fouling should first be removed through an appropriate cleaning procedure. SWD should then be introduced as a preventive treatment to help control subsequent marine growth.

18. Can SWD improve the cooling capacity of a vessel?

SWD does not directly increase the designed cooling capacity of the equipment. Its role is to help maintain the system in a condition where seawater flow and heat-transfer performance are not unnecessarily reduced by new biological fouling.

19. What is the recommended dosage of SWD?

The reference dosage is:

0.5 L per 100 tonnes of seawater flow for one hour.

Actual dosing should be confirmed against the current product TDS and vessel-specific seawater flow conditions.

20. What is the recommended dosing frequency?

Vessel Operating Condition	Recommended Frequency
Continuous coastal operation	Every 3 days
Ocean-going operation	Once per week
Ocean-going vessel in coastal waters	Every 2 days

21. What is the most important point to remember when using SWD?

The most important point is that SWD is a preventive marine-growth dispersant, not a heavy-duty fouling remover. Clean the cooling system first when existing fouling is present, then maintain regular preventive treatment.

Remarks / Precaution

How Seawater Dispersant SWD Works

Marine seawater cooling systems are continuously exposed to microorganisms and marine organisms. If biological growth attaches to heat-transfer surfaces, it can restrict seawater flow and reduce heat-transfer efficiency.

RXSOL Seawater Dispersant SWD works by dispersing marine growth and reducing its adhesion to seawater heat-transfer equipment. Regular treatment helps maintain cleaner heat-transfer surfaces and supports stable cooling performance.

Pre-Cleaning Requirement

If a seawater cooling system is already heavily fouled, the existing deposits and marine growth should be removed before beginning a preventive SWD treatment program.

Note that the dispersant is intended to prevent new growth and does not replace the cleaning required to remove established fouling.

Important Application Precaution

Seawater Dispersant SWD should not be dosed while seawater is being drawn as make-up water for an evaporator or water maker.

The evaporator/water maker should be isolated or shut down during dosing and for at least 30 minutes after dosing.

Seawater dispersant is available in 25-liter containers (PCN 5148409).For vessels which operate continuously in coastal waters,

we recommend dosing every three days. For all oceangoing vessels, we recommend dosing every two days while in coastal waters and at a minimum dose of once a week when not. Seawater dispersant should not be fed to a system while the seawater is being drawn as makeup for an evaporator or water maker. Either isolate the evaporator or shut it down while Seawater dispersant is being dosed and for at least 30 minutes afterward.

Note

Seawater dispersant may be dosed via a gravity head tank and flow-meter, an eductor dosing unit, or a suitable pump and tank system to a sea chest at the recommended concentration rate of 6 ppm for a period of one hour. To achieve 6 ppm, dose 0.6 liters of Seawater dispersant per 100 tons of water flow. Dosage should be for one hour. The best point for injection of the dilute solution of the product is immediately after the external sea chest COOLING WATER TREATMENT strainer. This provides total dispersion and mixing with the seawater. The mixed solution thus will contact all parts of the seawater cooling system.

Product Benefits

Helps maintain the design heat-transfer performance of seawater cooling systems
Helps control marine fouling and biological growth
Helps prevent marine growth from adhering to heat-transfer equipment
Suitable for microbiological and macrobiological fouling control
Concentrated liquid formulation
Low-odor formulation
Neutral-pH product
Easy to apply through standard dosing equipment
Does not require continuous dosing and monitoring
Non-corrosive to most metals
Suitable for marine seawater cooling applications
Helps reduce the risk of heat-transfer degradation caused by fouling
Does not contain phenolics or chlorinated solvents

Safety Data (MSDS)

Product Name	Seawater Dispersant SWD
Part Number	RXSOL-40-4003-026

Company Details:

RX MARINE INTERNATIONAL
105, A wing , BSEL , TECH PARK.
VASHI ,NEW BOMBAY 400703 INDIA

Branch : Kandla, Mumbai , Chennai, Vizag, Kolkata, UAE , OMAN , CANADA and KENYA

Phone	+91 22 20871200 - 1400
Fax	+91 22 27612100 :::AOH :0091 9821214367
Email	mail@rxmarine.com
Website	www.rxmraine.com

Chemical Name	CAS	EC number	Weight
Quaternary ammonium compounds, benzyl-C12- 16-alkyldimethyl, chlorides	68424-85-1	270-325-2	>=10 - 15%
Methanol	67-56-1	200-659-6	>=0.1 - 0.5%

Hazard Summary	Irritant
Risks	Risk of serious damage to eyes. .

General advice	Consult a physician. Show this safety data sheet to the doctor in attendance
Eye Contact	Hold eyelids apart and flush eyes with plenty of water for at least 15 minutes. Get medical attention. Remove contact lenses.
Skin Contact	Take off contaminated clothing and shoes immediately. Wash off immediately with plenty of water. Wash contaminated clothing before re-use. If skin irritation persists, call a physician.
Inhalation	Move to fresh air. If symptoms persist, call a physician. In case of shortness of breath, give oxygen.
Ingestion	Do not induce vomiting without medical advice. Never give anything by mouth to an unconscious person. Consult a physician if necessary.
Hazards	Inhalation of high concentrations of this material, as could occur in enclosed spaces or during deliberate abuse, may be associated with cardiac arrhythmias. Sympathomimetic drugs may initiate cardiac arrhythmias in persons exposed to this material.
Treatment	No information available.

Suitable extinguishing media	ABC powder, Water mist, Carbon dioxide (CO2), Dry chemical.
Unsuitable extinguishing media	Halons.
Hazardous combustion products	Carbon dioxide and carbon monoxide.
Personal protective equipment	In the event of fire, wear self-contained breathing apparatus. Use personal protective equipment.
Thermal decomposition	No data available
Precautions for fire-fighting	Keep containers and surroundings cool with water spray.

Personal precautions	Persons not wearing protective equipment should be excluded from area of spill until clean-up has been completed.
Environmental precautions	Prevent further leakage or spillage if safe to do so. No special environmental precautions required.
Methods for cleaning up	Large spills should be collected mechanically (remove by pumping) for disposal. Keep in suitable, closed containers for disposal.
Other information	Comply with all applicable federal, state, and local regulations.

Handling	Avoid formation of aerosol. Do not breathe vapours or spray mist. For personal protection see section 8. Provide sufficient air exchange and/or exhaust in work rooms. Avoid exceeding of the given occupational exposure limits (see section 8). Smoking, eating and drinking should be prohibited in the application area. Normal measures for preventive fire protection.
Storage	Store in original container. Keep containers tightly closed in a dry, cool and well-ventilated place. Stable under recommended storage conditions. Protect from frost.

Exposure Guidelines

MAC (NL)	time weighted average	200 ppm
MAC (NL)	time weighted average	260 mg/m3
MAC (NL)	Short term exposure limit	400 ppm
MAC (NL)	Short term exposure limit	520 mg/m3
EU ELV	time weighted average	200 ppm
EU ELV	time weighted average	260 mg/m3

General advice	These recommendations provide general guidance for handling this product. Personal protective equipment should be selected for individual applications and should consider factors which affect exposure potential, such as handling practices, chemical concentrations and ventilation. It is ultimately the responsibility of the employer to follow regulatory guidelines established by local authorities. Keep away from food, drink and animal feedingstuffs. When using do not eat, drink or smoke. Ensure that eyewash stations and safety showers are close to the workstation location.
Exposure controls	Provide sufficient mechanical (general and/or local exhaust) ventilation to maintain exposure below level of overexposure (from known, suspected or apparent adverse effects).
Eye protection	Safety glasses with side-shields
Skin and body protection	Wear as appropriate: Safety shoes Wear resistant gloves such as: Nitrile rubber
Respiratory protection	When workers are facing concentrations above the exposure limit they must use appropriate certified respirators

Physical state	Liquid
Colour	No data available
Odour	Clear
Odor Threshold	Not Applicable
pH	(+/- 0.7) 7.8
Melting Point	Not Applicable
Boiling Point	64.70 °C
Flash Point	Not Applicable
Evaporation Rate	(>) 1 (Ethyl Ether)
Flammability (solid, gas)	No data available
Explosive limits	No Data Available
Upper/lower flammability or explosive limits	3.3 %(V) /
Autoignition temperature	Not Applicable
Decomposition temperature	No data available
Vapour pressure	169.31 hPa @ 25 °C
Density	0.989 g/cm3 @ 77 °F / 25 °C
Vapour Density	Not Applicable
Relative Density	(>) 1 (AIR=1)
Freezing point	No data available
Specific Gravity	No data available
Partition coefficient	Not Applicable
Explosive properties	No data available
Solubility	Not Applicable
Ignition temperature	No information available.
Particle characteristics	No data available

Reactivity	No data available
Stability	No hazards to be specially mentioned
Possibility of hazardous reactions	Violent reactions possible with: Oxidizing agents Strong acids halogens Strong bases
Conditions to avoid	None known.
Incompatible materials	Strong oxidizing agents
Hazardous decomposition products	Carbon dioxide and carbon monoxide
Hazardous reactions	Hazardous polymerisation does not occur.

Exposure routes	Skin contact, Eye Contact, Ingestion, Inhalation
Eye contact	Causes serious eye irritation
Skin contact	May irritate skin.According to the classification criteria of the European Union, the product is not considered as being a skin irritant.
Ingestion	Not known to be harmful if swallowed.
Inhalation	Not known to be harmful if inhaled.
Aggravated Medical Condition	Preexisting disorders of the following organs (or organ systems) may be aggravated by exposure to this material: Skin, lung (for example, asthma-like conditions), Liver, Central nervous system, male reproductive system, Individuals with preexisting heart disorders maybe more susceptible to arrhythmias (irregular heartbeats) if exposed to high concentrations of this material.
Symptoms	Signs and symptoms of exposure to this material through breathing, swallowing, and/or passage of the material through the skin may include: stomach or intestinal upset (nausea, vomiting, diarrhea), irritation (nose, throat, airways), Cough, central nervous system depression (dizziness, drowsiness, weakness, fatigue, nausea, headache, unconsciousness), Lack of coordination, confusion, irregular heartbeat, respiratory failure, coma
Target Organs	May cause damage to organs through prolonged or repeated exposure. - Kidney
Acute oral toxicity	The substance/mixture does not contain components considered to have endocrine disrupting properties according to REACH Article 57(f) or Commission Delegated regulation (EU) 2017/2100 or Commission Regulation (EU) 2018/605 at levels of 0.1% or higher. Repeated dose toxicity - Rat - male and female - Oral - 90 d - NOAEL (No observed adverse effect level) - 3.000 mg/kg Remarks: Subchronic toxicity RTECS: KN5250000 Nausea, Vomiting, Dizziness, Central nervous system depression, Aspiration or inhalation may cause chemical pneumonitis., MTBE (methyl-tert-butyl ether) is reported to metabolize to tert-butyl alcohol and formaldehyde by microsomal demethylation, MTBE (methyl-tertbutyl ether) should be considered a "potential human carcinogen" due to an increase in leydig interstitial cell tumors of testes in male rats and an increase in lymphomas, leukemias, and uterine sarcomas in female rats., In another unpublished study MTBE was shown to be carcinogenic due to "increased incidence of a rare type of kidney tumor" in male rats and an "increase in the incidence of hepatocellular adenomas" in female mice. To the best of our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.
Acute dermal toxicity	Quaternary ammonium compounds, benzyl-C12-16- alkyldimethyl, chlorides no data available Methanol LD 50 Rabbit: 12,800 mg/kg

Biodegradation	No data available
Bioaccumulative potential	The bioaccumulation potential cannot be determined.
Component data Methanol (CAS 67-56-1)	48 h EC 50 Water flea (Daphnia magna) Static: > 10,000 mg/l

European Waste Catalogue	The Waste code should be assigned in discussion between the user and the waste disposal company.
Empty packaging	Empty remaining contents. Dispose of as unused product. Empty containers should be taken to an approved waste handling site for recycling or disposal. Do not re-use empty containers. Do not burn, or use a cutting torch on, the empty drum.
Waste treatment Method	No data available

UN number	ADR/RID: IMDG: IATA:
UN proper shipping name	ADR/RID: IMDG: IATA:
Transport hazard class(es)	ADR/RID: IMDG: IATA:
Packaging group	ADR/RID: IMDG: IATA:
Environmental hazards	ADR/RID: No IMDG: No IATA: No
Special precautions for user	Tunnel restriction code : (C/E)
Further information	Not classified as dangerous in the meaning of transport regulations.

Product Use Description	No data available
Hazard symbols	Irritant
R-phrase(s) R41	R41 Risk of serious damage to eyes.
S-phrase(s) S23	S23 Do not breathe vapour.S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 Wear eye/face protection. S51 Use only in well-ventilated areas. S60 This material and its container must be disposed of as hazardous waste.

Other Information

The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and weassume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no event shall be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Rx Marine International has been advised of the possibility of such damages.

DISCLAIMER OF LIABILITY :The information in this SDS was obtained from sources which we believe are reliable. However, the information is provided without any warranty, express or implied, regarding its correctness. The conditions or methods of handling, storage, use or disposal of the product are beyond our control and may be beyond our knowledge. For this and other reasons, we do not assume responsibility and expressly disclaim liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use or disposal of the product. This MSDS was prepared and is to be used only for this product. If the product is used as a component in another product, this MSDS information may not be applicable.