Phosphorous acid CAS#13598-36-2

CAS Number: 13598-36-2
Chemical Formula: H3O3P
Synonyms:

AURORA KA-1076
Phosphorous acid, 98%, extra pure
Phosphonsure

Appearance: White Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Phosphorous acid CAS#13598-36-2

Phosphorous acid is an intermediate in the preparation of other phosphorous compounds. It is a raw material to prepare phosphonates for water treatment such as iron and manganese control, scale inhibition and removal, corrosion control and chlorine stabilization. The alkali metal salts (phosphites) of phosphorous acid are being widely marketed either as an agricultural fungicide (e.g. Downy Mildew) or as a superior source of plant phosphorous nutrition. Phosphorous acid is used in stabilizing mixtures for plastic materials. Phosphorous acid is used for inhibiting high-temperature of corrosion-prone metal surfaces and to produce lubricants and lubricant additives.

Phosphorous acid Chemical Properties

Melting point	73 °C
Boiling point	200 °C
density	1.651 g/mL at 25 °C(lit.)
vapor pressure	0.001Pa at 20℃
Fp	200°C
storage temp.	0-6°C
solubility	DMSO (Slightly), Methanol (Slightly), Water (Sparingly)
pka	pK1 1.29; pK2 6.74(at 25℃)
form	Crystals
color	White
Specific Gravity	1.651
PH	pKa1= 1.10, pKa2 = 6.33(25℃)
Water Solubility	SOLUBLE
Sensitive	Air Sensitive & Hygroscopic
Merck	14,7346
Stability:	Stable. Incompatible with strong bases. Hygroscopic.
InChI	1S/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)
InChIKey	ABLZXFCXXLZCGV-UHFFFAOYSA-N
SMILES	[H]P(O)(O)=O
CAS DataBase Reference	13598-36-2(CAS DataBase Reference)
NIST Chemistry Reference	(HO)2HPO(13598-36-2)
EPA Substance Registry System	Phosphonic acid (13598-36-2)

Safety Information

Hazard Codes	C
Risk Statements	22-35
Safety Statements	26-36/37/39-45
RIDADR	UN 2834 8/PG 3
WGK Germany	1
RTECS	SZ6400000
F	3
TSCA	TSCA listed
HazardClass	8
PackingGroup	III
HS Code	28092019
Storage Class	8A - Combustible corrosive hazardous materials
Hazard Classifications	Acute Tox. 4 Oral Eye Dam. 1 Met. Corr. 1 Skin Corr. 1A

Product Application of Phosphorous acid CAS#13598-36-2

Phosphorous acid (H3PO3, orthophosphorous acid) may be used as one of the reaction components for the synthesis of the following:
α-aminomethylphosphonic acids via Mannich-Type Multicomponent Reaction
1-aminoalkanephosphonic acids via amidoalkylation followed by hydrolysis
N-protected α-aminophosphonic acids (phospho-isosteres of natural amino acids) via amidoalkylation reaction

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