food additive Lactose cas 63-42-3

Item

Specifications

Results

Characters

A white or almost while crystalline powder,freely but slowly soluble in water,practically insoluble in ethanol (96 per cent)

A white or almost while crystalline powder,freely but slowly soluble in water,practically insoluble in ethanol (96 per cent)

Identification A

The sample IR spectrum corresponds to spectrum of Reference Standard

The sample IR spectrum corresponds to spectrum of Reference Standard

Identification B

The principal spot in the chromatogram obtained with the test solution is similar in position,colour and size to the principal spot in the chromatogram obtained with reference solution (a)

The principal spot in the chromatogram obtained with the test solution is similar in position,colour and size to the principal spot in the chromatogram obtained with reference solution (a)

Identification C

Positive

Positive

Acidity or alkalinity

≤0.4 ml

0.2 ml

Specific optical rotation

+54.4°~+55.9°

+55.1°

Heavy metals

≤5 ppm

<5 ppm

Water

4.5%~5.5%

5.1%

Sulphated ash

≤0.1%

<0.1%

Loss on drying

≤1.0%

<1.0%

Appearance of solution

The solution is clear and not more intensely coloured than reference solution BY7

The solution is clear and less intensely coloured than reference solution BY7

Absorbance

≤0.04(400nm)

≤0.25(210nm~220nm)

≤0.07(270nm~300nm)

<0.04(400nm)

<0.25(210nm~220nm)

<0.07(210nm~220nm)

Total aerobic microbial count

≤100CGU/g

<10CFU/g

Escherichia coli

Absent/g

Absent/g

Conclusion

The results conforms with BP2010 standards