Reference number
ISO 3363:1976
ISO 3363:1976
© ISO 2025
International Standard
ISO 3363:1976
Fluorochlorinated hydrocarbons for industrial use — Determination of acidity — Titrimetric method
Edition 1
1976-09
1976-09
ISO 3363:1976
8649
Published
(Edition 1, 1976)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
Applicable to products the acidity of which is between 2 mol and 200 mol of univalent acid per kg. Two procedures are given: one is applicable to liquid products (R11, R113, etc.) and the other one to gaseous (R12, R22, etc.). The principle consists in extraction of the acids by water. Titration of the acids in the aqueous phase with standard volumetric sodium hydroxide solution in the presence of bromocresol green as indicator. A figure shows an apparatus for absorption of acids for products which are gaseous at ordinary temperatures.