ISO 1391-5:1981
Paraformaldehyde for industrial use — Methods of test — Determination of aldehyde content — Titrimetric method
T/CPCIF 0225-2022
ISO 1391-3:1976
Paraformaldehyde for industrial use — Methods of test — Part 3: Determination of iron content — 2,2'- Bipyridyl photometric method
ISO 1391-1:1976
Paraformaldehyde for industrial use — Methods of test — Part 1: General
ISO 1391-2:1976
Paraformaldehyde for industrial use — Methods of test — Part 2: Determination of ash
ISO 1391-4:1976
Paraformaldehyde for industrial use — Methods of test — Part 4: Determination of water-insoluble matter
31984D0512