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• Oxygen removal in low/medium-pressure boilers (typically up to ~65 bar; usage above this pressure is uncommon due to potential sulfate/solids carryover).
• Hot standby protection to prevent pitting during idle periods i.e. Oilfield Application.
• Feedwater & deaerator outlets where residual O₂ must be suppressed rapidly.

Reaction (overall):
Na₂SO₃ + ½ O₂ → Na₂SO₄

Catalyst accelerates the reaction at lower temperatures and shorter residence times (e.g., in deaerator outlets and feedwater lines)

• Deaerator outlet O₂: ≤ 7–10 ppb (if DA present)
• Sulfite residual in boiler water:
• Normal operation: 20–40 mg/L as Na₂SO₃
• High risk / wet lay-up: 60–100 mg/L as Na₂SO₃
• pH (feedwater/boiler): follow your internal treatment program (commonly FW pH 8.5–9.2; boiler water pH 10.5–11.5 depending on pressure).

• Preferably deaerator storage section or feedwater line upstream of economizer to ensure complete O₂ removal before the boiler.

Example Dose Calculation

Feedwater DO = 0.10 mg/L (100 ppb) at 20 m³/h.
Stoichiometric Na₂SO₃ = 0.10 × 7.88 = 0.788 mg/L.
With 1.3× safety factor → ~1.0 mg/L Na₂SO₃.
At 20 m³/h → 20 g/h Na₂SO₃ (as pure).
Using 38% liquid: 20 / 0.38 ≈ 52.6 g/h (~40 mL/h) (SG 1.32 ⇒ ~30 mL/h by mass; verify on site).
Fine-tune to maintain target sulfite residual in boiler.

• Rapid kinetics with catalyst—effective even at moderate temperatures.
• Reliable corrosion protection of pre-boiler & boiler circuits.
• Cost-effective vs. volatile scavengers for LP/MP systems.
• Easy control by simple sulfite residual testing.
• Compatible with most phosphate/polymer internal treatments.

Oxygen Scavenger supplier and exporter from Mumbai, Chennai, Kolkata, Visakhapatanm, Gandhidham, Fujairah, Sharjah, Dubai, Abudhabi, Gulf Middle East, Muscat Barka Sohar Oman, Nairobi Kenya Africa, Canada

Company Details:

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

Stock Point : Mumbai, Gandhidham, Chennai, Visakhapatnam, Kolkata, Fujairah, Muscat, Canada BC, Nairobi Kenya

Our hazard evaluation has identified the following chemical substance(s) as hazardous. Consult Section 15 for the nature of the hazard(s).

PERSONAL PRECAUTIONS :

Restrict access to area as appropriate until clean-up operations are complete. Do not touch spilled material.
Ventilate spill area if possible. Stop or reduce any leaks if it is safe to do so. Use personal protective equipment recommended in Section 8 (Exposure Controls/Personal Protection). Notify appropriate government, occupational health and safety and environmental authorities.

METHODS FOR CLEANING UP :

SMALL SPILLS: Soak up spill with absorbent material. Place residues in a suitable, covered, properly labeled container. Wash affected area. LARGE SPILLS: Contain liquid using absorbent material, by digging trenches or by diking. Reclaim into recovery or salvage drums or tank truck for proper disposal. Dispose of material in compliance with regulations indicated in Section 13 (Disposal Considerations). Contact an approved waste hauler for disposal of contaminated recovered material.

ENVIRONMENTAL PRECAUTIONS :

Do not contaminate surface water.

OCCUPATIONAL EXPOSURE LIMITS :
Exposure guidelines have not been established for this product. Available exposure limits for the substance(s) are shown below.

ENGINEERING MEASURES :

General ventilation is recommended. Local exhaust ventilation may be necessary when this material is heated or a mist is created.

RESPIRATORY PROTECTION :
If significant mists, vapors or aerosols are generated an approved respirator is recommended. An approved respirator must be worn if the occupational exposure limit is likely to be exceeded.

RESPIRATORY PROTECTION :
If significant mists, vapors or aerosols are generated an approved respirator is recommended. An approved respirator must be worn if the occupational exposure limit is likely to be exceeded.

HAND PROTECTION :
Neoprene gloves, Nitrile gloves, Butyl gloves, PVC gloves

SKIN PROTECTION :
Wear impervious apron and boots.

EYE PROTECTION :
Wear a face shield with chemical splash goggles.

HYGIENE RECOMMENDATIONS :
Keep a safety shower available. Keep an eye wash fountain available. If clothing is contaminated, remove clothing and thoroughly wash the affected area. Launder contaminated clothing before reuse.

HUMAN EXPOSURE CHARACTERIZATION :
Based on our recommended product application and personal protective equipment, the potential human exposure is: Moderate

 Note: These physical properties are typical values for this product and are subject to change.

No toxicity studies have been conducted on this product. 

ECOTOXICOLOGICAL EFFECTS :

The following results are for a similar product.

ACUTE FISH RESULTS :

ACUTE INVERTEBRATE RESULTS :

ENVIRONMENTAL HAZARD AND EXPOSURE CHARACTERIZATION
Based on our hazard characterization, the potential environmental hazard is: Low
Based on our recommended product application and the product's characteristics, the potential environmental

exposure is: Moderate

If released into the environment, see CERCLA/SUPERFUND in Section 15.

If this product becomes a waste, it is not a hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA) 40 CFR 261, since it does not have the characteristics of Subpart C, nor is it listed under Subpart D.

As a non-hazardous waste, it is not subject to federal regulation. Consult state or local regulation for any additional handling, treatment or disposal requirements. For disposal, contact a properly licensed waste treatment, storage,disposal or recycling facility.

The information in this section is for reference only and should not take the place of a shipping paper (bill of lading)specific to an order. Please note that the proper Shipping Name / Hazard Class may vary by packaging, properties,and mode of transportation. Typical Proper Shipping Names for this product are as follows.

LAND TRANSPORT :

AIR TRANSPORT (ICAO/IATA) :

MARINE TRANSPORT (IMDG/IMO) :

No Information Available.

Due to our commitment to Product Stewardship, we have evaluated the human and environmental hazards and exposures of this product. Based on our recommended use of this product, we have characterized the product's general risk. This information should provide assistance for your own risk management practices. We have evaluated our product's risk as follows:
* The human risk is: Low
* The environmental risk is: Low

Any use inconsistent with our recommendations may affect the risk characterization. Our sales representative will assist you to determine if your product application is consistent with our recommendations. Together we can implement an appropriate risk management process.

This product material safety data sheet provides health and safety information. The product is to be used in
applications consistent with our product literature. Individuals handling this product should be informed of the recommended safety precautions and should have access to this information. For any other uses, exposures should be evaluated so that appropriate handling practices and training programs can be established to insure safe workplace operations. Please consult your local sales representative for any further infomation.

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.