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ISO 172:1978
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ISO 172:1978 Plastics - Phenol-formaldehyde mouldings - Detection of free ammonia
standard by International Organization for Standardization, 08/01/1978
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Full Description
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.