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Phosphorous Acid

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Phosphorous Acid Specification

Refractive Rate
1.440

Boiling point
Decomposes before boiling

Molecular Weight
82.00 g/mol

Molecular Formula
H3PO3

HS Code
28111990

Taste
Sour

Smell
Odourless

Structural Formula
HPO(OH)2

Classification
Inorganic Acid

Inorganic Acid Types
Phosphorous Acid

Grade
Industrial, Technical

Purity
99% Min

Application
Water Treatment, Agrochemicals, Chemical Synthesis

Appearance
White Crystalline Powder

CAS No
10294-56-1

EINECS No
233-663-1

Other Names
Orthophosphorous Acid

Usage
Reducing Agent, Intermediate in Fertilizer Manufacture, Plasticizer

Melting Point
70 73C

Density
1.651 Gram per cubic centimeter(g/cm3)

Solubility
Soluble in water and alcohol

Raw Material
Phosphorus Trichloride, Water

Manufacturing Process
Hydrolysis of phosphorus trichloride

Hazard Class
8 (Corrosive)

Storage
Store in a cool, dry, and well-ventilated area

pH (1% solution)
1.52.0

Packaging
25 kg bags or drums

Stability
Stable under recommended storage conditions

Shelf Life
2 years from date of manufacture if unopened

UN Number
3264

About Phosphorous Acid

Phosphorous Acid

Composition :

Sr no.	Tests	Specifications	Results
1	Description	Colorless hygroscopic crystals	Colorless hygroscopic crystals
2	Assay (Min.)	98.0%	98.31%
3	Assay of phosphoric acid (H3PO4)	<1.0%	0.25%
4	Heavy metals (as Pb)	<0.001%	<0.001%
5	Chloride (Cl)	<0.001%	0.0006%
6	Sulfate (SO4)	<0.001%	0.0005%
7	Iron (Fe)	<0.005%	0.003%

Versatile Applications and Benefits

Phosphorous Acid serves as a vital component in water treatment processes, agrochemical production, and chemical synthesis. Its role as a reducing agent and fertilizer intermediate supports industries in achieving efficient chemical transformations and enhanced crop yields. Its high purity and solubility further increase its effectiveness in these functions.

Safety and Storage Precautions

Classified as a corrosive substance (Hazard Class 8), Phosphorous Acid must be handled with care. It should be stored in a cool, dry, and well-ventilated area to maintain stability and quality. Adhering to safety regulations ensures product longevity and minimizes hazards during transport and usage.

Quality and Specifications

With a minimum purity of 99%, Phosphorous Acid is offered in industrial and technical grades, guaranteeing consistent performance for specialized applications. Its white crystalline appearance, density of 1.651 g/cm, and melting point of 7073C highlight its refined manufacturing standards.

FAQs of Phosphorous Acid:

Q: How should Phosphorous Acid be stored to maintain its stability?

A: Phosphorous Acid should be stored in a cool, dry, and well-ventilated area to preserve its stability. Unopened, it retains its properties for 2 years from the date of manufacture.

Q: What are the main industrial uses of Phosphorous Acid?

A: Phosphorous Acid is primarily used in water treatment, agrochemical formulations, chemical synthesis, as a reducing agent, plasticizer, and an intermediate in the production of fertilizers.

Q: When can Phosphorous Acid be safely used after production?

A: Phosphorous Acid remains effective for up to two years if stored in its original, unopened packaging, ensuring optimal performance for industrial and technical applications during this period.

Q: Where is Phosphorous Acid typically sourced from and supplied?

A: Phosphorous Acid is manufactured in India and is supplied globally through dealers, exporters, manufacturers, retailers, suppliers, and traders in convenient packaging of 25 kg bags or drums.

Q: What process is used to manufacture Phosphorous Acid?

A: Phosphorous Acid is produced via the hydrolysis of phosphorus trichloride, using water as the reactant to yield the high-purity white crystalline powder.

Q: How is Phosphorous Acid beneficial in agrochemicals and fertilizers?

A: Phosphorous Acid acts as an intermediate in the manufacture of fertilizers, contributing to more efficient nutrient delivery and crop yield. Its reducing properties also benefit agrochemical formulations.

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