HYPOPHOSPHOROUS ACID

PRODUCT IDENTIFICATION
CAS NO. 6303-21-5

HYPOPHOSPHOROUS ACID
EINECS NO. 228-601-5
FORMULA H3PO2
MOL WT. 65.99
H.S. CODE 2811.19
TOXICITY Oral rat LD50: >90 ml/kg
SYNONYMS Phosphinic Acid; 次磷酸; Acide phosphinique (French);
Phosphinsäure (German); ácido fosfínico (Spanish);
DERIVATION  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE Clear to yellowish liquid
MELTING POINT

-25 C (Pure H3PO2

BOILING POINT 108 C (Decomposes)
SPECIFIC GRAVITY 1.274
SOLUBILITY IN WATER Miscible
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

 Health: 3 Flammability: 2 Reactivity: 2

REFRACTIVE INDEX

 
FLASH POINT

none
STABILITY Stable under ordinary conditions.

APPLICATIONS
Hypophosphorous acid is the phosphorus oxo acid or hydroxy phosphine oxide, with monobasic character. The term phosphinic acid is for the descriptive presentation of derivatives or salts which hydrogen atoms bound to phosphorus are replaced by organic groups, called phosphinates. The term hypophosphite is also used for any salt, ester or anion derived from the name of hypophosphorous acid. Hypophosphorous acid is a low-melting point compound soluble in water. It is a powerful reducing agent. Hypophosphorous acid and its sodium salt (sodium hypophosphite) are used as powerful reducing agents in various field. (Hypophosphorous acid has an advantage of easy implementation in solution.) They are used in:
  • Pharmaceutic aid as antioxidant
  • Retrieval of non-ferrous
  • Ingredient of electroless plating solutions.
  • Water treatment agent
  • Meat preservative.
  • Prevent the discoloration of polymers
  • Production of chemicals
SALES SPECIFICATION

50% GRADE

APPEARANCE

 Clear to yellowish liquid
H3PO2 50% min
H3PO3

1.0% max

SO4

0.01% max

Cl

 0.05% max
Fe

0.005% max
TRANSPORTATION
PACKING

30kgs , 100kgs in drum
HAZARD CLASS 8 (Packing Group: II)
UN NO. 3264
OTHER INFORMATION
Hazard Symbols: C, Risk Phrases: 34, Safety Phrases: 26