We manufacture and distribute fine chemicals and laboratory
products - with quality and delivery you can count on every time.


Phosphorous Acid, Reagent

P1100 | 13598-36-2 | H3PO3 | Spectrum Chemical

Catalog Size Package Availability Manufacturer List Price Unit
P1100-25GM 25 GM Spectrum Chemical $53.00 EA
P1100-125GM 125 GM Spectrum Chemical $102.00 EA
P1100-500GM 500 GM Spectrum Chemical $225.50 EA
P1100-2.5KG 2.5 KG Spectrum Chemical $657.00 $2471.50 EA CS(4)

P1100-12KG 12 KG Spectrum Chemical $1807.50 EA
P1100-25KGBL 25 KG Spectrum Chemical $3287.50 EA

Description Back to Top

Phosphorous Acid, Reagent, is a diprotic acid and is an intermediate in preparing of other phosphorus compounds. The biggest use of phosphorous acid is the production of phosphates that are used to treat water. It is also used in chemical reactions as a reducing agent. Its reagent grade means this is the highest quality commercially available for this chemical and that the American Chemical Society has not officially set any specifications for this material.

Specifications Back to Top

Test Specification
Min Max
CHLORIDE (Cl) 50 ppm
IRON (Fe) 20 ppm

Regulatory Documents Back to Top

The following documents may be required for purchase. For additional information, please contact Customer Service at 800-813-1514 or Compliance@SpectrumChemical.com

California Customer Only - This item is a CALIFORNIA PRECURSOR: 21-DAY HOLD FOR ALL CALIFORNIA ORDERS. Customers must complete form QAF481 and supply an intended use letter on company letterhead.

QAF481 Designation of Authorized Purchaser: California Specified Chemicals and Certain Glassware, Apparatus, Reagents and Solvents

Shipping & Storage Back to Top

Storage Information
HYGROSCOPIC, AIR SENSITIVE: Keep tightly closed.
Shipping Information
When shipping via FedEx Air the item will ship priority overnight. A higher hazmat fee will apply.

DOT: UN2834, Phosphorous acid, 8, PG III

Largest individual container shippable via:
UPS/FedEx Ground: 12 kg    UPS Air: 1 kg    FedEx Air: 50 kg

Additional UPS-imposed hazardous material charge.
Tariff No. 2811196090

Shipping Costs
Click here for Shipping Costs
P1100 has a rating of 5 stars based on 7 reviews.