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download between 0-24 hoursReleased: 1978
ISO 172:1978
ISO 172:1978-Plastics — Phenol-formaldehyde mouldings — Detection of free ammonia
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| Standard´s number: | ISO 172:1978 |
| Pages: | 1 |
| Edition: | 1 |
| Released: | 1978 |
DESCRIPTION
ISO 172:1978
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.