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.
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 |
|---|---|
| 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
-
Compressed Gas
GHS04
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
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.
Pricing & pack sizes
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.