PHOSPHOROUS ACID

PRODUCT IDENTIFICATION

CAS NO.

13598-36-2

EINECS NO.

237-066-7

FORMULA

(HO)2HPO

MOL WT.

82.00

HS CODE

2811.19

SYNONYMS

Orthophosphorous acid; Dihydroxyphosphine oxide;

Phosphorus; Trihydroxide; Trihydroxyphosphine; Phosphonsäure (Dutch); ácido fosfónico (Spanish); Acide phosphonique (French);

GENERAL DESCRIPTION

Phosphorous acid and phosphite are used as reducing agents in chemical industry because of easy oxidation property to phosphoric acid. They are used as antioxidant, stabilizer and chelating agent in plastic system. They are used as solvent in paint and as flame retardant on fibres. They are used as a chemical intermediate in the production of pharmaceutical ingredients, pesticides, optical brighteners and in lubricant additives and adhesives.

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

Clear to yellowish Crystal

MELTING POINT

73 C

BOILING POINT

200 C (Decomposes)

STABILITY

Has not been fully evaluated. Hygroscopic, air sensitive.

APPLICATIONS

Raw material to prepare phosphites; stabilizers for plastics; Water treatment; Bleaching and Cleaning industry; Chemical manufacturing

SALES SPECIFICATION

APPEARANCE

Clear to yellowish Crystal

PHOSPHOROUS ACID

98.5% min

PHOSPHATE

0.2% max

CHLORIDE

0.015% max

SULFATE

0.008% max

HEAVY METALS

15ppm max

IRON

15ppm max

TRANSPORTATION

PACKING

25kgs in bag

HAZARD CLASS

8 ( Packing group II )

UN NO.

2834