Boric Acid Powder

EP, USP (Tested for Endotoxin & Microbes)

CAS #:


Molecular Formula:



Hydrogen Borate, Boracic Acid, Orthoboric Acid

Molecular Weight:

61.83 g/mol


Boric Acid, Powder, NF is used as an antimicrobial preservative, a buffering agent and as a tonicity adjusting agent. It is a weak acid of boron often used as an antiseptic, insecticide, flame retardant, neutron absorber, or precursor to other chemical compounds. It exists in the form of colorless crystals or a white powder that dissolves in water. Boric acid is poisonous if taken internally or inhaled in large quantities.

Characters Unit Specification
Appearance white or almost white, crystalline powder
Assay (EP) % 99,0 – 100,5
Assay (USP) % 99,5 – 100,5
Identification A complies
Identification B complies
Appearance of solution clear and colourless
pH-value (for solution S, Ph. Eur.) 3,8 – 4,8
Solubility in ethanol-96% complies
Organic matter complies
Sulphate ppm max. 450
Heavy metals ppm max. 20
Loos on drying (USP) % max. 0,5
Completeness of solution (USP) complies
Total aerobic microbial count cfu/g max. 100
Total yeasts and moulds count cfu/g max. 50
E.coli cfu/g absent in 1g
Pseudomonas aeruginosa cfu/g absent in 1g
Staphylococcus aureus cfu/g absent in 1g
Salmonella cfu/g absent in 25g
Bacterial endotoxine IU/g max. 2,5

Shelf Life/Retest Date: Boric Acid Powder can be kept for at least 3 years if stored under recommended conditions.

Storage/Shipping Conditions:

  • Store under lock and key and with access restricted to technical experts or their assistants only.
  • Keep container sealed.
  • Recommended storage temperature: +15°C - +25°C
  • Storage class: 6.1 D

Pack Sizes: 3 Kg

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