
Plastics — Phenol-formaldehyde mouldings — Detection of free ammonia
NORM herausgegeben am 1.8.1978
Bezeichnung normen: ISO 172:1978
Ausgabedatum normen: 1.8.1978
Zahl der Seiten: 1
Gewicht ca.: 3 g (0.01 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: Specification of a qualitative method of detecting the presence of free ammonia or other volatile bases in phenol-formaldehyde mouldings by the exposure of an indicator paper to the vapour from a moistened powdered sample. It may be used when the absence of free ammonia is a requirement.