Processing
State Standard of Castor oil
State Standard of People’s Republic of China
Castor oil
GB 8234－87
This standard is suitable for purchasing，selling，allocating，processing and exporting commercial castor oil.
1) Technical requirement
Castor oil should has the following characteristic constants：
1.1 Specific gravity (20/
1.2 Refractive index (
1.3 I odine value：80～88
1.4 Saponification value(mgKOH/G)：177～187
1.5 Acetyl value（mgKOH/G）：≥140
2) Grade index
2.1 Table of castor oil grade index
|
Grade index |
1 |
2 |
|
Smell |
intrinsic smell of castor oil | |
|
Acid value，mgKOH/g≤ |
2.0 |
4.0 |
|
Moisture and volatile matter，%≤ |
0.10 |
0.20 |
|
Impurity，%≤ |
0.05 |
0.10 |
|
Transparency |
transparent |
slight turbid allowed |
|
Color and lustre（Lovibond scale） |
yellow 20, ,red ≤1.5 |
yellow 20, ,red ≤３.5 |
2.2 Grade 2 is the valuation base.
2.3 Castor oil could not mixed with other oil.