ASTM D1439 – Standard Test Methods for Sodium Carboxymethylcellulose
Description:
Significance and Use
5.1 Moisture analysis (along with purity) is used to calculate the amount of active polymer in the material and must be considered when determining the amount of sodium carboxymethylcellulose to use in various formulations.
Scope
1.1 These test methods cover the testing of sodium carboxymethylcellulose.
1.2 The test procedures appear in the following order:
| Sections | |
| Moisture | 4 – 9 |
| Degree of Etherification: | |
| Test Method A—Acid Wash | 10 – 17 |
| Test Method B—Nonaqueous Titration | 10, 12, 18 – 23 |
| Viscosity | 24 – 29 |
| Purity | 30 – 37 |
| Sodium Glycolate | 38 – 46 |
| Sodium Chloride | 47 – 54 |
| Density | 55 – 61 |
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
ASTM D1435