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| CAS No.: | 10294-56-1 |
|---|---|
| Name: | Phosphorous acid |
| Article Data: | 16 |
| Molecular Structure: | |
|
|
|
| Formula: | H3PO3 |
| Molecular Weight: | 81.9958 |
| Synonyms: | 10294-56-1 |
| EINECS: | 233-663-1 |
| Melting Point: | 73℃ |
| Solubility: | SOLUBLE |
| Appearance: | COA |
| Hazard Symbols: |
 Xn, C
|
| Risk Codes: | 22-35 |
| Safety: | 1/2-26-36/37/39-45 |
| Transport Information: | UN 2834 |
| PSA: | 74.28000 |
| LogP: | -0.80980 |
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- 10294-56-1
phosphorous acid
| Conditions | Yield |
|---|---|
| With chlorine byproducts: HCl; |
| Conditions | Yield |
|---|---|
| In perchloric acid Kinetics; oxidation hypophosphorous acid with silver(I) in aq. perchloric acid soln. at 30°C; |
| Conditions | Yield |
|---|---|
| With water In neat (no solvent) formation of H3PO3 and P(OH)3 is proved by UV absorption and mild oxidation of products of hydrolysis;; |
- 7647-01-0
hydrogenchloride
- 7732-18-5
water
- 78-93-3
butanone
C
- 6303-21-5
hypophosphorous acid
D
- 10294-56-1
phosphorous acid
| Conditions | Yield |
|---|---|
| With aluminium for 8h; Inert atmosphere; Schlenk technique; Sealed tube; Electrolysis; |
- 7647-01-0
hydrogenchloride
- 7732-18-5
water
- 107-87-9
2-Pentanone
C
- 6303-21-5
hypophosphorous acid
D
- 10294-56-1
phosphorous acid
| Conditions | Yield |
|---|---|
| With aluminium for 8h; Inert atmosphere; Schlenk technique; Sealed tube; Electrolysis; |
- 7647-01-0
hydrogenchloride
- 7732-18-5
water
A
- 86119-84-8, 7664-38-2
phosphoric acid
B
- 6303-21-5
hypophosphorous acid
C
- 10294-56-1
phosphorous acid
| Conditions | Yield |
|---|---|
| With 3,3-dimethyl-butan-2-one; aluminium for 8h; Inert atmosphere; Schlenk technique; Sealed tube; Electrolysis; |
| Conditions | Yield |
|---|---|
| With [Pt(H2O)2(1,1'-bis(diphenylphosphanyl)octamethylferrocene)](trifluoromethylsulfonate)2; water In tetrahydrofuran at 20℃; for 8h; Catalytic behavior; Mechanism; Reagent/catalyst; Solvent; Inert atmosphere; Schlenk technique; Sealed tube; |
- 4712-55-4
diphenyl hydrogen phosphite
A
- 2310-89-6
phenyl hydrogen phosphonate
B
- 10294-56-1
phosphorous acid
| Conditions | Yield |
|---|---|
| With water In tetrahydrofuran at 20℃; for 0.5h; Inert atmosphere; Schlenk technique; Sealed tube; |
- 13674-84-5
tris-(2-chloro, 1-methylethyl)-phosphate
A
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LACTIC ACID
B
- 57-55-6
propylene glycol
C
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1-hydroxypropan-2-yl dihydrogenphosphate
D
- 1611-31-0
diisopropylphosphate
E
- 513-02-0
triisopropyl phosphate
F
- 16136-84-8
cis-1-chloropropene
G
- 124-38-9
carbon dioxide
H
- 86119-84-8, 7664-38-2
phosphoric acid
J
- 16887-00-6
chloride
K
- 144-62-7
oxalic acid
M
- 14265-44-2
Phosphate
N
- 67-63-0
isopropyl alcohol
O
- 10294-56-1
phosphorous acid
| Conditions | Yield |
|---|---|
| With dihydrogen peroxide In water UV-irradiation; |
| Conditions | Yield |
|---|---|
| at 63℃; for 3h; |
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Specification
The Phosphorous acid, with the CAS registry number 10294-56-1, is also known as Caswell No. 663I. Its EINECS registry number is 233-663-1. This chemical's molecular formula is H3PO3 and molecular weight is 81.995781. Its IUPAC name is called phosphorous acid. Phosphorous acid is the production of phosphonates which are used in water treatment. Phosphorous acid is also used for preparing phosphite salts, such as potassium phosphite.
Physical properties of Phosphorous acid are: (1)ACD/LogP: -0.76; (2)ACD/LogD (pH 5.5): -4.01; (3)ACD/LogD (pH 7.4): -5.49; (4)ACD/BCF (pH 5.5): 1.00; (5)ACD/BCF (pH 7.4): 1.00; (6)#H bond acceptors: 3; (7)#H bond donors: 3; (8)#Freely Rotating Bonds: 3
Preparation of Phosphorous acid:
HPO(OH)2 is the product of the hydrolysis of its acid anhydride:
P4O6 + 6 H2O → 4 HPO(OH)2
(An analogous relationship connects H3PO4 and P4O10).
On an industrial scale, the acid is prepared by hydrolysis of phosphorus trichloride with water or steam:
PCl3 + 3 H2O → HPO(OH)2 + 3 HCl
Potassium phosphite is also a convenient precursor to phosphorous acid:
K2HPO3 + 2 HCl → 2 KCl + H3PO3
In practice aqueous potassium phosphite is treated with excess hydrochloric acid. By concentrating the solution and precipitations with alcohols, the pure acid can be separated from the salt.
Uses of Phosphorous acid: The most important use of phosphorous acid is the production of phosphonates which are used in water treatment. Phosphorous acid is also used for preparing phosphite salts, such as potassium phosphite.
When you are using this chemical, please be cautious about it as the following:
This chemical may cause damage to health and may destroy living tissue on contact. It is harmful if swallowed which may cause severe burns. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing, gloves and eye/face protection.
You can still convert the following datas into molecular structure:
(1)Canonical SMILES: OP(O)O
(2)InChI: InChI=1S/H3O3P/c1-4(2)3/h1-3H
(3)InChIKey: OJMIONKXNSYLSR-UHFFFAOYSA-N