Published
Cancels and replaces the first edition (1976). Establishes criteria for the purity of photographic-grade 1-phenyl-3-pyrazolidinone (phenidone) and specifies the test methods to be used to determine the purity.
WITHDRAWN
ISO 3299:1976
PUBLISHED
ISO 3299:1994
90.93
Standard confirmed
Jun 6, 2026