Product Name:L-Threonine

Quantity:1500kg

Batch No:130526

Producing date: 2013.05.26

Analysis date:2013.05.26

Expiry date:2013.05.25

Reference standard: USP24

Item

Specifications

Results

Appearance

White crystals or crystallin powder

Conform

Assay (C₃H₇NO₂) ,%(on dried basis)

98.5~101.5

99.5

Specific rotation

-26.7°~ -29.1°

-27.8°

pH value (1.0g/20mL water)

5.0~6.5

5.8

Loss on drying, %

≤0.2

0.12

Residue on ignition(as sulphated ash), %

≤0.4

0.06

Chloride(as Cl),%

≤0.05

<0.02

Sulphate (as SO₄),%

≤0.03

<0.03

Iron(as Fe), %

≤0.003

<0.003

Ammonium (as NH₄),%

≤0.02

<0.02

Heavy metals (as Pb),%

≤15ppm

<15ppm

Chromatographic purity

Pass USP Test (0.5% max individual impurity ,2% max of total impurities)

Conforms

Organic Volatile impurities

Meet the requirements

Conforms