Testing item

Testing standard

Specification

USP35-NF30

BP2013

appearance

white fine powder

white fine powder

identification

meet the specification

meet the specification

solubility

/

meet the specification

magnesium content,  %

4.0-5.0

4.0-5.0

PH value

meet the specification

meet the specification

chloride, %

≤0.1

≤0.1

sulfate, %

≤1.0

≤1.0

loss on drying, %

≤6.0

≤6.0

lead, ppm

≤10

≤10

nickel, ppm

≤5

≤5

cadmium, ppm

≤3

≤3

stearic acid content, %

≥40.0

≥40.0

stearic acid&palmitic acid content, %

≥90.0

≥90.0

bacteria, cfu/g

≤1000

≤1000

mould, cfu/g

≤100

≤100

pathogenic bacterium

not detectable

not detectable