GB/T 30921.5-2025 Pending National standards

GB/T 30921.5-2025 Test methods of purified terephthalic acid(PTA) for industrial use—Part 5:Determination of acid number

Publish Date: 2025-12-02 Implement Date: 2026-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 30921.5-2025

Standard Type: National standards

Standard Status: Pending

is_force_gb: no

CCS Name: Basic organic chemical raw materials

ICS Name: Organic acids

Publish Date: 2025-12-02

Implement Date: 2026-07-01

Publisher: 国家市场监督管理总局、国家标准化管理委员会

Technical Committee: 全国化学标准化技术委员会(SAC/TC 63)

Pages: 12 pages

Scope

本文件描述了测定工业用精对苯二甲酸（PTA)酸值的指示剂法和电位滴定法。
本文件适用于工业用精对苯二甲酸（PTA)酸值的测定。

Development Information

Drafting Units:

中国石化扬子石油化工有限公司、中石化(上海)石油化工研究院有限公司、中国石化仪征化纤有限责任公司、四川能投化学新材料有限公司、瑞士万通中国有限公司

Drafting Persons:

邵强、叶惠丽、俞昊、王川、李诚炜、钟选梦、雷志文、丁大喜、许鹏、宋玲、顾裕丰、李顶松、杨超、刘斌华

Word Count: 15 Thousand words Pages: 12 pages

Same series standard

GB/T 30921.6-2025 Test methods of purified terephthalic acid(PTA) for industrial use—Part 6:Determination of particle size distribution

Replace the following standards

GB/T 30921.5-2016 Test method of purified terephthalic acid(PTA) for industrial use—Part 5:Determination of acid number

Referenced Standards

GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions GB/T 601-2016 Chemical reagent—Preparations of reference titration solutions GB/T 3723-1999 Sampling of chemical products for industrial use—Safety in sampling GB/T 6679-2003 General rules for sampling solid chemical products GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values JJG 814-2015 Automatic Potentiometric Titrators

Related Standards

GB/T 1626-1988 Replaced

GB/T 1626-1988 Oxalic acid for industrial use

Publish Date: 1988-04-12

GB/T 2092-1992 Replaced

GB/T 2092-1992 Sebacic acid for industrial use

Publish Date: 1992-01-14

GB/T 2093-1993 Replaced

GB/T 2093-1993 Formic acid for industrial use

Publish Date: 1993-06-15

SH/T 1499.1-1997 Replaced

SH/T 1499.1-1997 Pure adipic acid

Publish Date: 1997-07-12

SH/T 1499.2-1997 Active

SH/T 1499.2-1997 Pure adipic acid--Determination of content--Titrimetric method

Publish Date: 1997-07-12

SH/T 1499.3-1997 Replaced

SH/T 1499.3-1997 Pure adipic acid--Measurement of ammonia solution colour(in Pt-Co scale)--Spectrophotometric method

Publish Date: 1997-07-12