Phosphorous acid
Phosphorous acid (CAS: 13598-36-2, Formula: H3O3P, MW: 82.00) is a white crystalline solid and a dibasic acid. It is a key intermediate in the synthesis of phosphite salts and various organic compounds. Primarily used in chemical synthesis and as a reducing agent, it is essential for producing flame retardants and plasticizers. TSS offers a high-purity grade for demanding laboratory and industrial applications.
- IUPAC
- Phosphonic acid
Chemical Synthesis Intermediate
Phosphorous acid serves as a crucial building block in organic and inorganic synthesis. It is a precursor for the production of phosphite esters, which find extensive use as antioxidants, stabilizers, and flame retardants in polymers and plastics.
Reducing Agent
Its reducing properties make phosphorous acid valuable in various chemical processes. It can be employed in the synthesis of other phosphorus-containing compounds and in specific metal finishing applications.
Stabiliser and Antioxidant Production
Phosphorous acid is an essential raw material for manufacturing phosphite-based stabilisers and antioxidants. These additives are critical for enhancing the longevity and performance of polymers by preventing degradation caused by heat and oxidation.
| Molecular weight | 82.00 |
|---|---|
| Empirical formula | H3O3P |
| Assay | 99% |
| Density | 1.651 g/mL at 25 °C(lit.) |
| Impurities tested | ≤0.001% heavy metals (as Pb) |
Hazard statements
- H302Harmful if swallowed
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2834 8 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | C |
| Risk statements (R) | 22-35 |
| Safety statements (S) | 26-36/37/39-45 |
| Cation traces | Fe: ≤10 mg/kg |
| Anion traces | chloride (Cl-): ≤10 mg/kg |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Phosphorous Acid used for?
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Phosphorous acid is primarily used as an intermediate in chemical synthesis, particularly for producing phosphite salts and esters. These derivatives are vital in manufacturing antioxidants, plasticizers, flame retardants, and in various reduction processes.
What is the CAS number and formula for Phosphorous Acid?
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The CAS number for Phosphorous Acid is 13598-36-2, and its chemical formula is H3O3P.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Phosphorous Acid with an assay of 99%. This product is supplied for technical and research use; TSS does not represent it as USP, BP, EP, or any other pharmacopoeia grade.
How should Phosphorous Acid be handled safely?
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Phosphorous Acid is corrosive and can cause severe skin burns and eye damage (H314) and is harmful if swallowed (H302). Always wear appropriate personal protective equipment, including eyeshields, face shields, and chemical-resistant gloves. Ensure good ventilation and handle only in designated areas.
How is Phosphorous Acid packed and shipped?
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Phosphorous Acid is shipped as UN 2834, Class 8, Packing Group III. TSS adheres to all international shipping regulations for hazardous materials, ensuring safe and compliant export.
How can I request a quote or sample for Phosphorous Acid?
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To request a quote or sample for Phosphorous Acid, please contact our sales team through the TSS website or by providing your details via the product inquiry form.
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