D820 (version 93(2023))

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:

 

Sections

 

 

Moisture and Other Matter Volatile at 105°C (Oven Method)

 5 and 6

Free Alkali or Free Acid

 7 and 8

Anhydrous, Salt-Free, Soda Soap

 9 – 12

Alcohol-Soluble Matter

13 and 14

Matter Insoluble in Water

15 and 15

Total Alkalinity of Matter Insoluble in Alcohol (Alkaline Salts)

16 and 17

Sodium Silicate

18 – 20

Phosphates

21 – 28

Phosphate (Colorimetric Method Using Molybdenum Blue)

29 – 34

Unsaponified and Unsaponifiable Matter

35 – 39

Free Fatty Matter

40

Chlorides in Alcohol-Soluble Matter

41 – 43

Rosin (McNicoll Method)

44 – 47

Synthetic Detergent (by Difference)

48

Neutral, Inorganic Salts

49

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.