Items

Specification

Appearance:

A white crystal or powder, odorless.

Taste:

Slightly sweet taste with bitter.

Melting point:

168-172 celsius degree

Insolubles:

Not more than 0.3%

pH value(in 1% solution):

10-11.5

Loss on drying:

Not more than 0.2%

Residue on Ignition:

Not more than 0.05%

Heavy metals:

Not more than 5ppm

Fe:

Not more than 2ppm

SO₄²⁺

Not more than 5ppm

Cl^-

Not more than 3ppm

Organic volatile impurities

Meets the requirements

Residue solvents:

Meet the requirements

Assay:

99.0 -101.5%