ISO 1391-4:1976
Paraformaldehyde for industrial use; Methods of test; Part 4 : Determination of water-insoluble matter

Standard No.

ISO 1391-4:1976

Release Date

1976

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Replace By

ISO 1391-4:1976/Cor 1:1977

Latest

ISO 1391-4:1976/Cor 1:1977

Scope

The principle of the procedure consists in the dissolution of a test sample in a highly diluted sodium hydroxide solution, filtration by using a tared filter crucible, drying of the residue at (100 2) ?C. Determination of the in water insoluble substances by differences. - ISO 1391, Parts 1 to 4, replace ISO Recommendation R 1391-1970.

ISO 1391-4:1976 history

• 1970 ISO 1391-4:1976/Cor 1:1977 Test methods for industrial paraformaldehyde Part 4: Determination of water-insoluble matter content Corrigendum 1
• 1976 ISO 1391-4:1976 Paraformaldehyde for industrial use; Methods of test; Part 4 : Determination of water-insoluble matter