Propyl p-hydroxybenzoate

ITEM

STANDARD

RESULTS

Appearance

White crystalline powder

complies

Purity (on dry base)%

98.0-102.0

99.71

Melting point °C

96-99

96.8

Sulphated ash %

<0.05

<0.01

Acidity (mlNaOH0.1M)

≤0.1

0.04

Loss on drying %

≤0.50

0.17

Residue %

≤0.10

0.03

Arsenic (ppm)

≤1.0

<1.0

Heavy metals (Pb)ppm

≤10.0

<10.0

Mercury (mg/kg)

<1

0.04

lead (mg/kg)

<5

0.12

Clarity and color of solution

Clear and transparent

complies