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ASTM D820-93(2003)

ASTM D820-93(2003)

Standard Test Methods for Chemical Analysis of Soaps Containing Synthetic Detergents

2010-12-31 /Historical
Superseeded by:

These test methods detail the standard procedures for the chemical analysis of soaps containing synthetic detergents. The analytical procedures include the determination of the following chemical properties and substances: moisture and other matter volatile at a specified temperature; free alkali or free acid; anhydrous, salt-free soda soap; alcohol-soluble matter; matter insoluble in water; total alkalinity of matter insoluble in alcohol (alkaline salts); sodium silicate; phosphates; phosphates by colorimetric method using molybdenum blue); unsaponified and unsaponifiable matter; free fatty matter; chlorides in alcohol-soluble matter; rosin by McNicoll method; synthetic detergent by difference; and neutral inorganic salts.


1.1 These test methods cover procedures for the chemical analysis of soaps containing synthetic detergents.

1.2 The analytical procedures appear in the following order:

Moisture and Other Matter Volatile at 105°C (Oven Method)5 and 6
Free Alkali or Free Acid7 and 8
Anhydrous, Salt-Free, Soda Soap9-12
Alcohol-Soluble Matter13 and 14
Matter Insoluble in Water15
Total Alkalinity of Matter Insoluble in Alcohol (Alkaline Salts)16 and 17
Sodium Silicate18-20
Phosphate (Colorimetric Method Using Molybdenum Blue)29-34
Unsaponified and Unsaponifiable Matter35-39
Free Fatty Matter40
Chlorides in Alcohol-Soluble Matter41-43
Rosin (McNicoll Method)44-47
Synthetic Detergent (by Difference)48
Neutral, Inorganic Salts49

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

chemical analysis; soaps; synthetic detergents
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