Molekula
Hypophosphorous acid, 50% aq. soln.
Hypophosphorous acid, 50% aqueous solution, is a strong reducing agent used in electroless nickel plating, chemical synthesis, and as a stabilizer in polymerization reactions. It is a clear, colorless to pale yellow liquid with a pungent odor. CAS: 6303-21-5, molecular formula: H3O2P, molecular weight: 66.0 g/mol. Store at ambient temperature. Hazardous: signal word Danger. Molekula supplies Hypophosphorous acid, 50% aq. soln. from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Hypophosphorous acid, 50% aqueous solution, is a strong reducing agent used in electroless nickel plating, chemical synthesis, and as a stabilizer in polymerization reactions. It is a clear, colorless to pale yellow liquid with a pungent odor. CAS: 6303-21-5, molecular formula: H3O2P, molecular weight: 66.0 g/mol. Store at ambient temperature. Hazardous: signal word Danger. Molekula supplies Hypophosphorous acid, 50% aq. soln. from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Pricing & pack sizes
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless liquid |
| Density | 1.21 - 1.26 |
| Heavy metals | ≤ 0.0002% |
| Identification | Conforms to reference |
| Chloride (Cl) | ≤ 0.015% |
| Assay | ≥ 50.0% |
| Iron (Fe) | ≤ 0.0015% |
| Sulphate (SO4) | ≤ 0.015% |
| Arsenic (As) | ≤ 0.0001% |
| Sodium (Na) | ≤ 0.10% |
| Colour ( Hazen ) | ≤ 20 |
| H3PO3 | ≤ 0.3% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Shelf Life | 24 months |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 18774297 |
| CAS Number | 6303-21-5 |
| Molecular Formula | H3O2P |
| Molecular Weight | 66.0 |
| SMILES | O[PH2]=O |
| EC / UN Number | 3264 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2811.19.6190 |
| Tariff Code | 2811198090 |
Safety & GHS
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Corrosive
GHS05
Hazard statements
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
For research and industrial use only
Documents
Safety Data Sheets (SDS)
Available in PT, RU, FR, IT, ES, DE, EN.
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PT - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · PT · 214 KB
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RU - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · RU · 349 KB
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FR - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · FR · 215 KB
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IT - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · IT · 210 KB
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ES - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · ES · 213 KB
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DE - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · DE · 214 KB
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EN - (18774297) HYPOPHOSPHOROUS ACID, 50% AQ. SOLN. [6303-21-5].pdf
SDS · EN · 211 KB
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is hypophosphorous acid, 50% aq. soln. used for?
It is primarily used as a reducing agent in chemical synthesis, electroless nickel plating, and as a stabilizer in polymerization reactions.
What is the chemical formula and molecular weight of hypophosphorous acid, 50% aq. soln.?
The formula is H3O2P and the molecular weight is 66.0 g/mol.
How should hypophosphorous acid, 50% aq. soln. be stored?
It should be stored at ambient temperature, away from incompatible materials and strong oxidizing agents.
What grade of hypophosphorous acid, 50% aq. soln. is available?
We supply it as a 50% aqueous solution, suitable for industrial and laboratory use.
Can Molekula supply hypophosphorous acid, 50% aq. soln. in bulk?
Yes, we can supply bulk quantities—please contact our sales team for pricing and delivery options.
What documentation comes with an order of hypophosphorous acid, 50% aq. soln.?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.