Hypophosphorous Acid CAS 6303-21-5 Phosphinic Acid Reducing Agent & Electroplating Chemical Bulk Supply
TDS 31 Inquiries
6303-21-5
Pharmaceutical Grade
99.99%
Qingdao
Orient
Vial/Bottle/Bag/Carton
2026-09-14
pharmaceutical intermediates,peptides,electronic chemicals
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Product Description
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Seller Information
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History Price
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Inquiry History
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DescriptionECHEMI Editorial ReferenceIt is deliquescent crystals or colorless oil. Melting point: 26.5℃. The relative density (specific gravity): 1.439 (solid, 19℃). It is soluble in water, ethanol and ether, and it can be mixed in any proportion with water, ethanol, acetone. In the air, it easily deliquesce to syrupy liquid, and the aqueous solution is acidic.
Hypophosphorous acid is monobasic acid, in aqueous solution, Hypophosphorous acid is strong acid, Ka = 10-2 (25℃); it is relatively stable at room temperature; disproCertificatesBasic Info-
Product Name:
Phosphinic acid
Other Name:Phosphinic acid;Phosphine oxide,hydroxy-;Hypophosphorous acid;Phosphonous acid;Hydroxyphosphine oxide;Dihydroxyphosphine;60062-19-3
CAS No.:6303-21-5
Molecular Formula:H3O2P
InChIKeys:InChIKey=ACVYVLVWPXVTIT-UHFFFAOYSA-N
Molecular Weight:129.97700
Exact Mass:129.95800
EC Number:270-206-5
HScode:2811199090
Categories:
Characteristics-
PSA:
108.10000
XLogP3:-0.50560
Appearance:colourless liquid
Density:1.479 g/cm3 @ Temp: 20 °C
Melting Point:23-25 °C
Boiling Point:108ºC(759.8513 torr)
Refractive Index:1.39 (20ºC)
Water Solubility:H2O: soluble
Storage Conditions:Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition so
Vapor Pressure:<17 mmHg ( 20 °C)
Hazard IdentificationClassification of the substance or mixture
Corrosive to metals, Category 1
Skin corrosion, Sub-category 1B
Serious eye damage, Category 1
GHS label elements, including precautionary statements
Pictogram(s) 
Signal word Danger
Hazard statement(s) H290 May be corrosive to metals
H314 Causes severe skin burns and eye damage
Precautionary statement(s) Prevention P234 Keep only in original packaging.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash ... thoroughly after handling.
P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response P390 Absorb spillage to prevent material damage.
P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P363 Wash contaminated clothing before reuse.
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316 Get emergency medical help immediately.
P321 Specific treatment (see ... on this label).
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P317 Get medical help.
Storage P406 Store in a corrosion resistant/...container with a resistant inner liner.
P405 Store locked up.
Disposal P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions for safe handling
Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.
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Seller Information
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Business Type:
Trader
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Main Products:
pharmaceutical intermediates,peptides,electronic chemicals
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Location:
Room 102, 1st Floor, East Office Building, No. 45 Pengwan Road, Qianwan Bonded Port Area, Qingdao Zone, China (Shandong) Pilot Free Trade Zone
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Payment Terms:
100% TT in advance
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Average lead Time:
10
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Total Annual Revenue:
$10 million-$25 million
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Total Employees:
51-100
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Year of Establishment:
2024
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Weekly Price
The chart shows the price trend of the product in the past 12 months.
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Inquiry History31 Inquiries
Country Product Purchase Quantity Date Posted 
Australia
6303-21-5 Hypophosphorous acid
1 MT Sep 29, 2023 
France
Hypophosphorous acid 99% liquid 6303-21-5
1 MT Sep 25, 2023 
New Zealand
Hypophosphorous acid
1 KG Mar 4, 2026
Australia
Hypophosphorous Acid
1 MT Jul 17, 2026
Australia
Hypophosphorous Acid
100 L Feb 24, 2026
New Zealand
Hypophosphorous acid
1 KG Dec 23, 2025
Australia
Hypophosphorous Acid H3po2 99%
1 KG Jul 18, 2025
New Zealand
Hypophosphorous Acid
1 MT Sep 18, 2024
Australia
Hypophosphorous acid
500 L Sep 2, 2024
Australia
Hypophosphorous Acid
1 KG Jun 6, 2024
Australia
Hypophosphorus Acid
1 KG Apr 2, 2024
Australia
Hypophosphorous acid
1 L May 11, 2026 
United States
Hypophosphorous acid H3PO2
100 G Aug 19, 2025
Australia
Hypophosphorous Acid H3po2 99%
10 MG Aug 11, 2025
Australia
Hypophosphorous Acid
5 KG Aug 11, 2025
Australia
Hypophosphorous acid H3PO2 99%
2 L May 15, 2024
Australia
Hypophosphorous Acid
1 Jan 23, 2024
New Zealand
Hypophosphorous acid
20 KG Jan 13, 2024
New Zealand
Hypophosphorus acid
2 L Dec 9, 2023 
India
Phosphinic acid
20 MT Nov 1, 2023 Post an enquiry for this product
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