NEN-ISO 172
Plastics - Phenol-formaldehyde mouldings - Detection of free ammonia
inactive, Most Current
| Organization: | NEN |
| Publication Date: | 30 June 1979 |
| Status: | inactive |
| ICS Code (Thermosetting materials): | 83.080.10 |
scope:
This International Standard specifies 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 powdered sample. It may be used when the absence of free ammonia is a requirement.
Document History
NEN-ISO 172
June 30, 1979
Plastics - Phenol-formaldehyde mouldings - Detection of free ammonia
This International Standard specifies 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...