ISO 2524-1974 rus PDF

Full title and description

ISO 2524:1974 — Adipate esters for industrial use — Measurement of colour after heat treatment. The standard specifies a heat‑treatment procedure for adipate esters (simple and mixed alcohol esters liquid at ambient temperature) and the subsequent measurement of colour using the method given in ISO 2211.

Abstract

The method applies to simple and mixed alcohol adipate esters that are liquid at ambient temperature. A sample is heat‑treated in a borosilicate glass tube immersed in an oil bath at (180 ± 2) °C for 2 hours; after heat treatment the colour of the sample is measured by the procedure specified in ISO 2211 (Hazen/platinum‑cobalt scale). The published document is a short technical procedure (2 pages) and has been withdrawn.

General information

• Status: Withdrawn (withdrawal stage recorded by ISO and national bodies).
• Publication date: April 1974 (Edition 1, 1974-04).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 71.080.70 (Esters).
• Edition / version: 1 (1974).
• Number of pages: 2.

Scope

This standard defines a laboratory heat‑treatment and colour‑measurement procedure for adipate esters used in industry. It is intended to provide a reproducible way to assess colour changes after exposing samples to a defined elevated temperature for a fixed time, enabling comparative quality control and acceptance testing of liquid adipate esters and related plasticizer products. The colour measurement is referenced to ISO 2211.

Key topics and requirements

• Applicability: simple and mixed alcohol adipate esters that are liquid at ambient temperature.
• Heat‑treatment conditions: borosilicate glass tube in an oil bath at (180 ± 2) °C for 2 hours.
• Colour measurement: performed according to ISO 2211 (Hazen/platinum‑cobalt scale).
• Purpose: standardize comparative colour assessment after thermal stress for quality control and specification compliance.
• Short format: the published standard is concise (2 pages) focusing on procedural steps rather than extended background or test evaluation criteria.

Typical use and users

Chemical manufacturers (especially producers of adipate esters and plasticizers), quality control laboratories, testing houses, standards bodies and R&D groups use the procedure to check product stability and batch consistency after controlled heat exposure. It is primarily a QC/acceptance test rather than a detailed research protocol.

Related standards

ISO 2211:1973 (Liquid chemical products — Measurement of colour in Hazen units / platinum‑cobalt scale) is directly referenced for the colour measurement stage. ISO 2524 is part of a family of short ISO methods for adipate esters (see related ISO 2525–2527 series items); national equivalents/identical texts include NBN T 04 257:1983 and NFT 20 708:1984, while BS 4835:1973 is similar. Note: ISO 2524 has been withdrawn and is not currently maintained as an active ISO International Standard.

Keywords

adipate esters, esters, heat treatment, colour measurement, ISO 2211, Hazen units, platinum‑cobalt scale, oil bath, borosilicate tube, plasticizers, quality control.

FAQ

Q: What is this standard?

A: ISO 2524:1974 is an ISO test procedure titled "Adipate esters for industrial use — Measurement of colour after heat treatment" that defines a short, repeatable heat‑treatment and colour measurement method for liquid adipate esters.

Q: What does it cover?

A: It covers the sample containment (borosilicate tube), heat‑treatment conditions (oil bath at 180 ± 2 °C for 2 h) and the requirement to measure the sample's colour after treatment using the method in ISO 2211. The document is procedural and concise (2 pages).

Q: Who typically uses it?

A: Manufacturers of adipate esters and related plasticizers, QC and analytical laboratories, testing services and standards organizations that need a standardized way to compare colour changes after thermal exposure.

Q: Is it current or superseded?

A: ISO 2524:1974 has been withdrawn. ISO records and national standards bodies indicate it is no longer an active International Standard; some catalogues/national bodies list withdrawal dates around 2002 while other resellers/catalogues show later catalog withdrawal records. Check your national standards body or ISO catalogue for the authoritative current status for your country.

Q: Is it part of a series?

A: Yes — ISO 2524 is one of a group of short ISO methods covering various test methods for adipate esters (see adjacent ISO numbers such as ISO 2525, ISO 2526, ISO 2527), and it references ISO 2211 for the colour measurement technique.

Q: What are the key keywords?

A: Adipate esters, heat treatment, colour after heating, ISO 2211, Hazen units, oil bath, borosilicate tube, plasticizer testing, esters (ICS 71.080.70).