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Phosphorous acid CAS#13598-36-2

  • Phosphorous acid CAS#13598-36-2
  • Phosphorous acid CAS#13598-36-2
  • Phosphorous acid CAS#13598-36-2
  • Phosphorous acid CAS#13598-36-2
  • Phosphorous acid CAS#13598-36-2

Phosphorous acid CAS#13598-36-2

Serves as a key intermediate for the preparation of various phosphorus compounds.


Used to produce phosphonates for water treatment, including scale inhibition, corrosion control, and chlorine stabilization.


Alkali metal salts (phosphites) act as effective agricultural fungicides and high-quality sources of plant phosphorus nutrition.


Functions in stabilizing plastic mixtures, protecting corrosion-prone metal surfaces at high temperatures, and producing lubricants and lubricant additives.

Phone ：+86 18626059817
WhatsApp ：+86 18626059817
Email ：cora@wxqysteel.com
product description

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

Phosphorous acid is an important intermediate for the synthesis of various phosphorus compounds. It acts as a key raw material for water-treatment phosphonates, applicable to iron and manganese regulation, scale inhibition and removal, corrosion protection and chlorine stabilization. Its alkali metal phosphites are widely used as agricultural fungicides against downy mildew and serve as an excellent phosphorus nutrient source for plants. Besides, it is used for stabilizing plastic blends, high-temperature anti-corrosion protection of metal surfaces, as well as the production of lubricants and lubricant additives.


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

Phosphorous acid (H₃PO₃, orthophosphorous acid) is a key raw material for synthesizing the following products:

α-aminomethylphosphonic acids via Mannich multicomponent reactions

1-aminoalkanephosphonic acids by amidoalkylation and subsequent hydrolysis

N-protected α-aminophosphonic acids (phospho-isosteres of natural amino acids) through amidoalkylation reactions




Product Information

Parameters


Melting point73 °C
Boiling point200 °C
density1.651 g/mL at 25 °C(lit.)
vapor pressure0.001Pa at 20℃
Fp200°C
storage temp.0-6°C
solubilityDMSO (Slightly), Methanol (Slightly), Water (Sparingly)
pkapK1 1.29; pK2 6.74(at 25℃)
formCrystals
colorWhite
Specific Gravity1.651
PHpKa1= 1.10, pKa2 = 6.33(25℃)
Water SolubilitySOLUBLE
SensitiveAir Sensitive & Hygroscopic
Merck147346
Stability:Stable. Incompatible with strong bases. Hygroscopic.
InChI1S/H3O3P/c1-4(2)3/h4H,(H2,1,2,3)
InChIKeyABLZXFCXXLZCGV-UHFFFAOYSA-N
SMILES[H]P(O)(O)=O
CAS DataBase Reference13598-36-2(CAS DataBase Reference)
NIST Chemistry Reference(HO)2HPO(13598-36-2)
EPA Substance Registry SystemPhosphonic acid (13598-36-2)

Safety Information


Hazard CodesC
Risk Statements22-35
Safety Statements26-36/37/39-45
RIDADRUN 2834 8/PG 3
WGK Germany1
RTECSSZ6400000
F3
TSCATSCA listed
HazardClass8
PackingGroupIII
HS Code28092019
Storage Class8A - Combustible corrosive hazardous materials
Hazard ClassificationsAcute Tox. 4 Oral
Eye Dam. 1
Met. Corr. 1
Skin Corr. 1A


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