Methyl p hydroxybenzoate

ITEM

STANDARD

Appearance

White crystalline powder

Purity (on dry base)%

>=99

Melting point ℃

125-128

Sulphated ash %

<0.05

Acidity (mlNaOH0.1M)

=<0.1

Loss on drying %

=<0.5

Residue %

=<0.10

Arsenic (ppm)

=<1

Heavy metals (Pb)ppm

=<10

Mercury (mg/kg)

<1

Lead (mg/kg)

<5

Clarity and color of solution

Clear and transparent