Testing standard

USP35-NF30

Specification and model

SA-4

SA-6

SA-9

appearance

white or almost white wax crystal, solid or powder

white or almost white wax crystal, solid or powder

white or almost white wax crystal, solid or powder

identification

meet the specification

meet the specification

meet the specification

freezing point, ℃

53~59 

57~64

64~69

acid value

194-212

194-212

194-212

iodine value 

≤1.0

≤1.0

≤1.0

ignition residue, %

≤0.1

≤0.1

≤0.1

heavy metal, %

≤0.001

≤0.001

≤0.001

stearic acid content, %

40~45

65~70

≥90

stearic acid&palmitic acid content, %

≥90

≥90

≥96