sodium ascorbate with good quality and lower price

Items

Standard

Results

Appearance

White to slightly yellow crystalline powder

White crystalline powder

Identification

Positive

Positive

Clarity of solution

Clear, ≤BY₆

Clear

Assay

99.0-101.0%

100.1%

Loss on drying

≤0.25%

0.04%

Sulphate

≤150ppm

<150ppm

Specific rotation

+103°~+106°

+105.2°

PH (10%, W/V)

7.0-8.0

7.7

Residual solvents (as Methanol)

≤3000ppm

<3000ppm

Heavy metals (as Pb )

≤10ppm

<10ppm

Iron

≤2ppm

<2ppm

Copper

≤5ppm

<5ppm

Oxalic acid

≤0.3%

<0.3%

Arsenic

≤3ppm

<3ppm

Lead

≤2ppm

<2ppm

Nickel

≤1ppm

<1ppm

Mercury

≤1ppm

<1ppm

Related substances

Impurity C≤0.15%

Impurity D≤0.15%

other unspecific impurities≤0.10%

Total impurity≤0.2%

Complies

Total plate count

≤1000cfu/g

<1000cfu/g

According to BP2012, E301, USP35, FCC8

Items

Standard

Results

Appearance

White crystalline powder

White crystalline powder

Identification

Positive

Positive

Clarity of solution

Clear

Clear

Color of solution

≤BY₇

<BY₇

Assay

99.0-100.5%

99.6%

Loss on drying

≤0.4%

0.05%

Residue on ignition

≤0.1%

0.03%

Sulphate ash

≤0.1%

0.03%

Specific rotation

+20.5°~+21.5°

+20.88°

PH (with 2% water solution)

2.4-2.8

2.60

PH (with 5% water solution)

2.1-2.6

2.34

Melting range

About 190℃

191℃

Heavy metals

≤3ppm

<3ppm

Iron

≤2ppm

<2ppm

Copper

≤5ppm

<5ppm

Impurity E

≤0.2%

<0.2%

Arsenic

≤1ppm

<1ppm

According to BP2013, E300, USP36, FCC8, EP7

Items

Standard

Results

Appearance

White or yellowish granular powder

Pass

Assay

96.0-98.0%

97.6%

Loss on drying

≤0.20%

0.15%

Residue on ignition

≤0.1%

0.04%

Heavy metals (Pb)

≤20ppm

<20ppm

Particle size

≥95% through 20 mesh

100.0%

≤25% through 100 mesh

3.8%

According to Enterprise Standards

Items

Standard

Results

Appearance

White to slightly yellow granular

Pass

Identification

Positive

Pass

Clarity of solution

Clear, ≤BY₆

Clear, <BY₆

Assay

96.0-98.0%

96.9%

Loss on drying

≤0.20%

0.13%

Heavy metals (Pb)

≤10ppm

<10ppm

Arsenic

≤3ppm

<3ppm

Particle size

≥95% through 20 mesh

100.0%

≤25% through 100 mesh

24.03%

According to Enterprise Standards

Items

Standard

Results

Property

White or light yellow powder

Stable in light, heat and air, easily dissolves in acid

Pass

Identification

(1)         Should be Positive

Positive

(2)         Wavelength Max. Absorbance should be 261-265nm

263nm

(1)Should be Positive

Positive

Assay (Ascorbic Acid)

≥35.0%

35.6%

Loss on drying

≤10.0%

4.07%

Arsenic

≤0.0005%

<0.0005%

Lead

≤0.003%

<0.003%

Conclusion

The above product conforms to GB/T19422-2003