Vitamin B1

Testing Item

Standard

Result

Appearance

White or Almost White, Crystalline Powder or Small, Colourless Granule

conforms

Assay (on dry basis)

98.5% -101.0%

100.0 percent

Identification

A: IR Absorption;

C: Reaction of Nitrates

conforms

Appearance of Solution

Clear, Not More Intense than Y7

conforms

PH

6.8~7.5

7.2

Loss on Drying

≤ 0.5%

0.08 percent

Chloride

≤ 0.06%

<0.06 percent

Sulphated Ash

≤ 0.1%

0.02 percent

Heavy Metals

≤10 mg/kg

<10 mg/kg

Testing Item

Standard

Result

Appearance

White Crystals or Crystalline

Powder

White Crystalline Powder

Assay (on anhydrous basis)

98.0% -102.0%

99.7 percent

Appearance of solution

Clear, Not More Intense than Y7 or GY7

Clear, Not More Intense than Y7

Appearance of solution

Clear, Not More Intense than Y7

Conforms

PH

2.7~3.3

3.2

Water

≤ 5.0%

3.44 percent

Sulphates

≤ 0.03%

<0.03 percent

Residue on Ignition

≤ 0.1%

0.01 percent

Absorbance of Solution

≤ 0.025

0.012

Limit of Nitrate

No brown ring is producedat the junction of the two layers

No brown ring is produced

the junction of the two layers

Related Compounds

≤ 1.0%

0.02 percent