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GB/T 631-2026: Chemical reagent - Ammonia solution
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 631-2026	English	299	Add to Cart	3 days [Need to translate]	Chemical reagent - Ammonia solution
GB/T 631-2007	English	209	Add to Cart	3 days [Need to translate]	Chemical reagent -- Ammonia solution
GB/T 631-1989	English	199	Add to Cart	2 days [Need to translate]	Chemical reagent--Ammonia solution (25%)

GB/T 631-2026: Chemical reagent - Ammonia solution

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ICS 71.040.30 CCSG62 National Standards of the People's Republic of China Replaces GB/T 631-2007 Chemical reagent ammonia Published on 2026-02-27 Implemented on 2026-09-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 631-2007 "Chemical Reagent Ammonia Water". Compared with GB/T 631-2007, the main differences are structural adjustments and editorial changes. Aside from the modifications, the main technical changes are as follows. a) Added technical requirements and testing methods for high purity and superior purity grades (see Chapters 5 and 6); (b) Three ion chromatography methods for the determination of chloride, sulfate, and phosphate have been added (see 6.4.2, 6.6.2, and 6.8.2); c) Seven inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) methods were added for sodium, magnesium, potassium, calcium, iron, copper, and lead. Two methods for determination by spectroscopic methods (see 6.10.2 and 6.10.3); d) Packaging and signage have been changed (see Chapter 8, Chapter 7 of the.2007 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Petroleum and Chemical Industry Federation. This document is under the jurisdiction of the National Technical Committee on Chemical Standardization (SAC/TC63). This document was drafted by. Nanjing Qunke Chemical Research Institute, Jiangsu Provincial Institute of Product Quality Supervision and Inspection, and Beijing Chemical Reagent Research Institute. Limited Liability Company, Hunan Huihong Reagent Co., Ltd., Zhejiang Haizhou Pharmaceutical Co., Ltd., Yonghua Chemical Co., Ltd., Kunshan Jinko Microelectronics Co., Ltd. Electronic Materials Co., Ltd., Huizhou Huadatong Gas Manufacturing Co., Ltd., Zhengzhou Heyi Environmental Protection Technology Co., Ltd., Shanxi Tongjie Chemical Reagent Company Limited. The main drafters of this document are. Su Yuqian, Qiu Ailing, Zhao Jifei, Wang Yuhua, Zhu Sihao, Wang Biwei, Yin Yanhong, Xu Shan, Duan Xiangjiang, and Zhou Jingjing. Chen Guihong, Jian Jinxiang, Wang Wenling, Qu Jian, Li Ming. The release history of this document and the document it replaces is as follows. ---First published in 1965 as GB/T 631-1965, revised for the first time in 1977, revised for the second time in 1989, and revised for the third time in.2007. This revision; ---This is the fourth revision. Chemical reagent ammonia Warning---Some of the testing procedures specified in this document may lead to hazardous situations. Users are responsible for taking appropriate safety and health precautions. Implement the measures and ensure they comply with the conditions stipulated by relevant national laws and regulations.

1 Scope

This document specifies the properties, technical requirements, inspection rules, packaging and marking of the chemical reagent ammonia, and describes the corresponding test methods. This document applies to the testing of the chemical reagent ammonia. Note. The chemical reagent ammonia has the molecular formula NH3·H2O, a relative molecular mass of 35.05 (based on the 2022 international relative atomic mass), and the CAS number is [missing information]. 1336-21-6.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 601 Preparation of Standard Titration Solutions for Chemical Reagents GB/T 602 Preparation of standard solutions for the determination of impurities in chemical reagents GB/T 603 Preparation of reagents and products used in chemical reagent test methods GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 9723-2007 General Rules for Flame Atomic Absorption Spectrometry of Chemical Reagents GB/T 9727 General Method for Determination of Phosphate with Chemical Reagents GB/T 9728 General Method for Determination of Sulfate with Chemical Reagents GB/T 9729 General Method for Determination of Chloride in Chemical Reagents GB/T 9740 General Method for Determination of Evaporation Residue of Chemical Reagents GB 15258 Regulations for Writing Safety Labels for Chemicals GB 15346 Packaging and Marking of Chemical Reagents GB/T 23942-2009 General Rules for Inductively Coupled Plasma Atomic Emission Spectrometry of Chemical Reagents GB 28644.2 Limited Quantity and Packaging Requirements for Dangerous Goods GB/T 34672-2017 General Rules for the Determination of Chemical Reagents by Ion Chromatography GB/T 39486-2020 General Rules for Inductively Coupled Plasma Mass Spectrometry Analysis of Chemical Reagents HG/T 3921 Sampling and Acceptance Rules for Chemical Reagents

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined. 4.Characteristics Ammonia water is an aqueous solution of ammonia. It is colorless, transparent, and has a pungent odor. It absorbs carbon dioxide from the air and has a density of approximately 0.90 g/mL. ...