Hypophosphorous Acid (HPA)
Click each tab below for product information
Hypophosphorous Acid General Information
Chemical Name: Hypophosphorous Acid
Synonyms: Hypophosphorous Acid, Phosphine oxide, Phosphinic acid
Chemical Formula: H3PO2
CAS Number: 6303-21-5
EC Number: 228-601-5
Hypophosphorous Acid Uses
Bleaching Agent – Hypophosphorous Acid is used as a bleaching or decolorizing agent for plastics, synthetic fibers, and chemicals
Color Stabilizer – HPA is used as a decolorizing agent and for color stabilization during the manufacture of chemicals and several plastics including: nylon fibers, polyamides, polyester fiber, polyacrilonitrile, alkyd rsins, epoxies, fatty acid esters, and glycerols.
Hypophosphite Salts – Hypophosphorous Acid is used in the production of Hypophosphite Salts (i.e., Calcium, Magnesium, Manganese, Potassium, Iron, and Ammonium) which are in turn used in synthetic fibers as wetting dispersing, emulsifying, and anti-static agents
Chemical Intermediate – Used in organic synthesis and organo phosphinic acid production
Neturalizing Agent – Used as a moderately strong monobasic acid
Catalyst – Used as a polymerization and polycondensation catalyst
Wetting Agent – Used as a wetting, dispersing, or emulsifying agent in electroplating
Reducing Agent – May be used for its strong but slow reducing action
Antioxidant – Hypophosphorous Acid may be used as an antioxidant
Pharmaceutical – HPA may be used as a stimulant in pharmaceuticals
Hypophosphorous Acid Certificate of Analysis (COA)
Product Name: Hypophosphorous Acid, 50%
Quality: SMC Spec.605
Batch 20101223/11288
| Test/Property | Specification | Result |
| Appearance | Clear, white solution | Clear, white solution |
| Assay (H3PO2) | 50.00 TO 52.00 % | 50.38 % |
| Chloride (Cl), ppm | 150 ppm MAXIMUM | 20 |
| Color, (APHA) | Less than 30 APHA | Less than 30 APHA |
| Iron (Fe), ppm | 10 ppm MAXIMUM | 2 |
| Orthophosphite, % | 0.500 % MAXIMUM | 0.400 |
| Specific Gravity @ 25 deg C | 1.210 TO 1.265 G/CC | 1.210 |
CERTIFIED TRUE AND CORRECT W H
Approval Date: 8/2/2011
Spec Revision