Glycerin

Method

Specified Range

Typical values

Relative density 20 /20°C²

ISO 2099 (Part 2) : 1972

1.2623 min

1.2632

Refractive index n20D²

APAG-GL-006 : 1988

1.4731 min

1.4737

Glycerine content %¹

APAG-GL-009 : 1988

99.5 min

99.8

Colour APHA¹

ASTM D1209 : 1993

10 max

2.5

Fatty acids & esters ¹

(ml 0.5N NaOH/50g)

USP XXllI : 1995

1.0 max

0.14

Sulphated ash %²

USP XXllI : 1995

0.01 max

0.004

Chlorides ppm Cl²

USP XXllI : 1995

10 max

<  10

Heavy metals ppm Pb²

USP XXlIl (Mtd 1) : 1995

5 max

<    5

Chlorinated compounds ppm Cl²

USP XXllI : 1995

30 max

<  30

Arsenic ppm²

USP XXllI : 1995

1.5 max

< 1.5

Sulphate ppm²

USP XXllI : 1995

20 max

<  20