HG/T 2784-2012 Ammonium Sulfite for Industrial Use

preface

This standard is drafted in accordance with the rules given in GB/T 1.1—2009.

This standard replaces HG/T 2784—1996 "Industrial Ammonium Sulfite". Compared with HG/T 2784—1996, the main technical changes are as follows, except for editorial modifications:

— The requirement for sampling was deleted (see chapter 4 of the 1996 edition);

— Revised the requirements for iodine solution in the determination of ammonium bisulfate monohydrate (see 4.2.2.2.1 and 5.1.2.2.2 in the 1996 edition);

— Revised the requirements for sodium hydroxide solution used in preparing ammonium sulfate formaldehyde solution (see 4.2.3.2.1 and 5.1.3.2.7 in the 1996 edition);

— Revised the calculation formula (see chap. 4; chap. 5, 1996 edition);

— Revised the permissible deviation for determining the mass fraction of ammonium sulfate (see 4.2.5 and 5.1.3 in the 1996 edition);

— Increased testing rules (see Chapter 5);

— Deletion of the provisions on labelling and addition of provisions on transport and storage (see chap. 6, 1996 edition).

This standard is proposed by China Petroleum and Chemical Industry Federation.

This standard is administered by the Technical Committee on Sulfur and Sulfuric Acid (SAC/TC63/SC7) under the National Chemical Standardization Technical Committee.

The drafting units of this standard are: Nanhua Group Research Institute, Jiangsu Provincial Product Quality Supervision and Inspection Institute, Huai 'an City Product Quality Supervision and Inspection Institute, Shandong Provincial Product Quality Supervision and Inspection Institute.

The main drafters of this standard are: Wu Xiaolian, Qiu Ailing, Zhang Xiaoqiang, Feng Junting, Chen Changyi, Zou Huiling, Wang Wei.

The release history of the standards replaced by this standard is as follows:

——ZB/T G12 003—1987、HG/T 2784—1996。

Industrial ammonium sulfite

Warning-Some reagents used in this standard are toxic or corrosive, and some operations are dangerous. This standard does not reveal all possible safety problems. Users should use it correctly in strict accordance with relevant regulations, and have the responsibility to take appropriate safety and health measures.

1 Scope

This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of ammonium sulfite for industrial use.

This standard applies to solid ammonium sulfite and liquid ammonium sulfite products obtained by reaction of ammonium bicarbonate or other ammonia sources with sulfur dioxide.