Sodium Hexa Meta Phosphate (Grade II)

Synonyms : Hexametaphosphate, sodium salt; SHMP; Metaphosphoric acid, hexasodium salt; Sodium polyphosphates, glassy



Molecular Formula


Molecular Weight



White, odorless, powder




Phosphate (as P2O5)% MIN by mass

62.0 % MIN

Matter insoluble in water % MIN by Mass

0.5 Max

Loss in ignition % MIN by mass

5 Max

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Material Safety Data Sheet

Sodium Hexa Meta Phosphate  (II)


Section 1: Chemical Product and Company Identification


Chemical Name: Metaphosphoric Acid, hexasodium salt


CAS#: 10124-56-8 or 68915-31-1

RTECS: OY3675000

TSCA: TSCA 8(b) inventory: Sodium hexametaphosphate

CI#: Not available.

Synonym: Calgon, HMP, Medi-Calgon, SHMP; Sodium

Polyphosphates; Glassy; Sodium Polymetaphosphate;

Sodium phosphate glass; Polyphosphoric Acids, sodium salts

Chemical Formula: (NaPO3)n or (NaPO3)*6 or O18-P6.6Na


Contact Information:


Vishnupriya Chemicals Pvt. Ltd.


Office No. 7, Meridian apartments

Lake Hills Road, New MLA Quarters

Basheerbagh, Hyderabad 63,  A.P

Tel :  040 - 23225550

Fax : 040 23223177

Email :

Website :


Section 2: Composition and Information on Ingredients






% by Weight

Sodium Hexa Meta Phosphate  (II)

10124-56-8 or 68915-31-1



Toxicological Data on Ingredients: Sodium hexametaphosphate: ORAL (LD50): Acute: 6200 mg/kg [Rat]. 4320 mg/kg [Mouse]. 3053 mg/kg [Rat].


Section 3: Hazards Identification


Potential Acute Health Effects:

Hazardous in case of eye contact (irritant), of ingestion. Slightly hazardous in case of skin contact (irritant, sensitizer), of inhalation.


Potential Chronic Health Effects:





Repeated or prolonged exposure is not known to aggravate medical condition.


Section 4: First Aid Measures


Eye Contact:

Check for and remove any contact lenses. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Cold water may be used. Get medical attention.


Skin Contact:

Wash with soap and water. Cover the irritated skin with an emollient. Get medical attention if irritation develops.

Cold water may be used.


Serious Skin Contact: Not available.



If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention.


Serious Inhalation: Not available.



Do NOT induce vomiting unless directed to do so by medical personnel. Never give anything by mouth to an unconscious person. Loosen tight clothing such as a collar, tie, belt or waistband. Get medical attention if symptoms appear.


Serious Ingestion: Not available.


Section 5: Fire and Explosion Data


Flammability of the Product: Non-flammable.


Auto-Ignition Temperature: Not applicable.


Flash Points: Not applicable.


Flammable Limits: Not applicable.


Products of Combustion: Not available.


Fire Hazards in Presence of Various Substances: Not applicable.


Explosion Hazards in Presence of Various Substances:

Risks of explosion of the product in presence of mechanical impact: Not available.

Risks of explosion of the product in presence of static discharge: Not available.


Fire Fighting Media and Instructions: Not applicable.


Special Remarks on Fire Hazards:

When heated to decomposition it emits highly toxic fumes of ohosphoxides and Na2O.

Behavior in a fire: It may melt with loss of steam.


Special Remarks on Explosion Hazards: Not available.


Section 6: Accidental Release Measures


Small Spill:

Use appropriate tools to put the spilled solid in a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and dispose of according to local and regional authority requirements.


Large Spill:

Use a shovel to put the material into a convenient waste disposal container. Finish cleaning by spreading water on the contaminated surface and allow to evacuate through the sanitary system.


Section 7: Handling and Storage



Do not ingest. Do not breathe dust. Avoid contact with eyes. Wear suitable protective clothing. If ingested, seek medical advice immediately and show the container or the label. Keep away from incompatibles such as oxidizing agents, acids.


Storage: Keep container tightly closed. Keep container in a cool, well-ventilated area.


Section 8: Exposure Controls/Personal Protection


Engineering Controls:

Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure limits. If user operations generate dust, fume or mist, use ventilation to keep exposure to airborne contaminants below the exposure limit.


Personal Protection:

Splash goggles. Lab coat. Dust respirator. Be sure to use an approved/certified respirator or equivalent.   Gloves.


Personal Protection in Case of a Large Spill:

Splash goggles. Full suit. Dust respirator. Boots. Gloves. A self contained breathing apparatus should be used to avoid inhalation of the product. Suggested protective clothing might not be sufficient; consult a specialist BEFORE handling this product.


Exposure Limits: Not available.


Section 9: Physical and Chemical Properties


Physical state and appearance: Solid. (Crystals solid.)


Odor: Odorless.


Taste: Not available.


Molecular Weight: (101.96)*6 or 611.52 g/mole


Color: White.


pH (1% soln/water): 7 [Neutral.]


Boiling Point: 1500C (2732F)


Melting Point: 550C (1022F)


Critical Temperature: Not available.


Specific Gravity: Density: 1.25 (Water = 1)


Vapor Pressure: Not applicable.


Vapor Density: Not available.


Volatility: Not available.


Odor Threshold: Not available.


Water/Oil Dist. Coeff.: Not available.


Ionicity (in Water): Not available.


Dispersion Properties: See solubility in water.



Easily soluble in cold water, hot water.

Soluble in water, but it dissolves slowly.

Depolymerizes in aqueous solutions to form sodium trimetaphosphate and sodium orthophosphates.

Insoluble in organic solvents.


Section 10: Stability and Reactivity Data


Stability: The product is stable.


Instability Temperature: Not available.


Conditions of Instability: Incompatible materials


Incompatibility with various substances: Reactive with oxidizing agents.


Corrosivity: Slightly corrosive in presence of steel.


Special Remarks on Reactivity: Hygroscopic; keep container tightly closed.


Special Remarks on Corrosivity: Not available.


Polymerization: Will not occur.


Section 11: Toxicological Information


Routes of Entry: Inhalation. Ingestion.


Toxicity to Animals: Acute oral toxicity (LD50): 3053 mg/kg [Rat].


Chronic Effects on Humans: Not available.


Other Toxic Effects on Humans:

Hazardous in case of ingestion.

Slightly hazardous in case of skin contact (irritant, sensitizer), of inhalation.


Special Remarks on Toxicity to Animals: Not available.


Special Remarks on Chronic Effects on Humans: Not available.


Special Remarks on other Toxic Effects on Humans:

Potential Health Effects:

Skin: May cause skin irritation.

Eyes: Causes eye irritation.

Inhalation: May cause respiratory tract irritation. Symptoms may include coughing and shortness of breath.

Ingestion: Phosphates are slowly and incompletely absorbed when ingested, and seldom result in systemic effects. However, such effects have occurred. May cause gastrointestinal tract irritation with nausea, vomiting, and diarrhea. May affect behavior/central nervous system/peripherial nervous system (somnolence, convulsions, lethargy, flaccid paralysis), urinary system (kidneys- renal failure, acute tubular necrosis). It may also cause heart disturbances (fall in blood pressure, slow pulse) and blood chemistry effects (reduction of serum level of calcium). The toxicity of phosphates is because of their ability to sequester calcium. Systemic metabolic acidosis may result as this material is believed to be hydrolyzed to ortho phosphates when ingested (before absorption). Tetany may also occur as a result of reduction in serum level of ionic calcium.


Section 12: Ecological Information


Ecotoxicity: Not available.


BOD5 and COD: Not available.


Products of Biodegradation:

Possibly hazardous short term degradation products are not likely. However, long term degradation products may arise.


Toxicity of the Products of Biodegradation: The product itself and its products of degradation are not toxic.


Special Remarks on the Products of Biodegradation: Not available.


Section 13: Disposal Considerations


Waste Disposal:  Waste must be disposed of in accordance with federal, state and local environmental control regulations.




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