Sodium Dihydrogen Phosphate Monohydrate

BP, USP + LEC + Microbiological requirements

CAS #:


Molecular Formula:

H2NaO4P . H2O


Sodium Phosphate Monobasic

Molecular Weight:

137.99 g/mol


Sodium dihydrogen Phosphate Monohydrate is a reagent with very high buffering capacity widely used in molecular biology, biochemistry and chromatography. Sodium phosphate monobasic is highly hygroscopic and water soluble. Useful in conjunction with Sodium Phosphate, Dibasic in the preparation of biological buffers. Used in many applications including the purification of antibodies.

Characters Unit Specification
Identity A (EP,BP) requirements
Identity B (EP,BP) requirements
Identity C (EP,BP) requirements
Identity D (EP,BP) requirements
Identity A (USP) requirements
Identity B (USP) requirements
Appearance of solution (EP,BP) Correlates to test
Al,Ca and related elements USP Correlates to test
Reducing substances (EP,BP) Correlates to test
Assay (EP,BP) % 98,0-100,5
Assay (USP) % 98,0-103,5
Loss on drying (EP,BP) % 11,5-14,5
Water (USP) % 10,0-15,0
Ph (5%) 4,2-4,5
Insoluble matter in water (USP) % <=0,20
Heavy metals (as Pb) mg/kg <=10
Arsenic (USP) mg/kg <=8
Arsenic (EP,BP) mg/kg <=2
Iron (EP,BP) mg/kg <=10
Sulphates (USP) mg/kg <=1500
Sulfates (EP,BP) mg/kg <=300
Chlorides (USP) mg/kg <=140
Chlorides (EP,BP) mg/kg <=200
Bacterial endotoxine lU/g <=5
TAMC 30oC (Total aerobic microbial count) cfu/g <=50
TYMC cfu/g <=10
Escherichia coli cfu/g
Staphylococcus aureus cfu/g
Pseudomonas aeruginosa cfu/g
Salmonella cfu/10g

Shelf Life/Retest Date: Sodium dihydrogen Phosphate Monohydrate CAS NO. 10049-21-5 raw material can be kept for at least 3 years if stored in a cool and dry place.

Storage/Shipping Conditions:

  • Keep tightly closed. Keep in a dry place.
  • Storage rooms: Keep at temperatures below 25 °C.
  • Storage category: VCI 10-13

Pack Sizes: 5 Kg

Please enter your name.
Please enter your company name.
Please enter your email.
Phone number should be between 7 - 15 digits!
Please enter product name.
Please enter your message.