Calcium hypophosphite, with the chemical formula Ca(H₂PO₂)₂, is hygroscopic and a normal salt. In China, it is classified as a non-hazardous chemical and is mainly used in animal feed additives, halogen-free flame retardants, and food additives. Calcium hypophosphite has the CAS number 7789-79-9. It is a reducing and antioxidant calcium phosphate salt with a solubility of 16.7 g/100 g water at room temperature. Its aqueous solution has a pH less than 7, exhibiting weak acidity.

I. Basic Information

English Name: Calcium hypophosphite

Molecular Formula: Ca(H2PO2)2

HS Code: 28351000.00

CAS Number: 7789-79-9

UN Code: 3178

Molecular Weight: 170.06

II. Technical Specifications

Content≥98.%

pH Value (100g/L): 5.0-7.0

Whiteness ≥96.0

1% Decomposition Temperature: 350℃

III. Main Uses

Calcium hypophosphite can be used as a food additive, plastic modifier, animal nutrient, filler, cod liver oil supplement, flame retardant, chemical nickel plating additive, in pharmaceutical manufacturing, and as an antioxidant and analytical reagent.

IV. Firefighting Measures

1. Extinguishing Media

Extinguishing Methods and Agents

Adopt appropriate firefighting measures according to the situation and surrounding environment. 2. Specific Hazards Originating from this Substance or Mixture: Phosphorus oxides, calcium oxide

3. Advice for Firefighters: Wear a self-contained breathing apparatus (SCBA) if necessary when fighting fires.

4. Further Information: Cool unopened containers with water spray. This substance itself is not flammable.

V. Packaging: 25 kg/bag, composite plastic film-coated waterproof bag with an inner aluminum foil bag.

VI. Transport Information

1. UN Dangerous Goods Numbers:

European Land Dangerous Goods Code: 3178; International Maritime Dangerous Goods Code: 3178; International Air Dangerous Goods Code: 3178

2. UN Transport Names:

European Land Dangerous Goods Code: FLAMMABLESOLID, INORGANIC, N.O.S. (Calcium phosphoric acid)

International Maritime Dangerous Goods Code: FLAMMABLESOLID, INORGANIC, N.O.S. (Calcium phosphoric acid)

International Air Dangerous Goods Code: Flammable solid, organic, N.O.S. (Calcium phosphoric acid) 3. Transport Hazard Class

European Land Dangerous Goods Code: 4.1

International Maritime Dangerous Goods Code: 4.1

International Air Dangerous Goods Code: 4.1

4. Parcel Group

European Land Dangerous Goods Code: II

International Maritime Dangerous Goods Code: II

International Air Dangerous Goods Code: II

5. Environmental Hazards

European Land Dangerous Goods Code: No

International Maritime Dangerous Goods Code

Marine Pollutant (Yes/No): No

International Air Dangerous Goods Code: No

6. Special Reminders for Users

No data available

The main raw materials for calcium hypophosphite are sodium hypophosphite and calcium chloride. In PA6, it can be compounded with other phosphorus and nitrogen flame retardants, resulting in good flame retardant effects. The price of calcium hypophosphite is closely related to yellow phosphorus, sodium hypophosphite, etc. During the production process, dispersibility, purity, and impurity control have a significant impact on quality.