GB/T 2091-2008 in English

《GB/T 2091-2008工业磷酸》由TC63（全国化学标准化技术委员会）归口，TC63SC1（全国化学标准化技术委员会无机化工分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了工业磷酸的分类要求、试验要求、检验规则、标志、标签、包装、运输和储存。本标准适用于以 工业黄磷为原料生产的工业磷酸 。该产品主要用于电镀、磷化液和工业磷酸盐的生产。 本标准修改采用日本标准ＪＩＳＫ１４４９：１９７８（１９８８年确认）《磷酸》（日文版）。 本标准代替ＧＢ／Ｔ２０９１―２００３。
本标准与ＧＢ／Ｔ２０９１―２００３的主要差异：
―――合格品的重金属质量分数的指标参数由０．０５％修改为０．００５％（２００３版４．２，本版５．２）；
―――修改了氯化物和重金属试验方法；
―――增加了附录Ａ和附录Ｂ。

1 Scope

This standard specifies classification requirements, test methods, inspection rules, marking, labeling, packaging, transportation and storage of phosphoric acid for industry use.
This standard is applicable to phosphoric acid for industry use, made of yellow phosphorus, mainly used for production of electroplating and phosphating solution and industrial phosphate.

2 Normative References

The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB 190-1990 Packing Symbol of Dangerous Goods
GB/T 605 Chemical Reagent - General Method for the Measurement of Colour (GB/T 605-2006, ISO 6353-1: 1982, EQV)
GB/T 610.1-1988 Chemical Reagent - General Method for the Determination of Arsenic
GB/T 1250 Rules for Expression and Judgment of Limiting Values
GB/T 3049-2006 Chemical Products for Industrial Use - General Method for Determination of Iron Content – 1, 10-Phenanthroline Spectrophotometric Method (ISO 6685: 1982, IDT)
GB/T 6678 General Principles for Sampling Chemical Products
GB/T 6682-1992 Water for Analytical Laboratory Use - Specification and Test Methods (eqv ISO 3696: 1987)
HG/T 3696.1 Inorganic Chemical Products Preparations of Standard Titration solutions for Chemical Analysis
HG/T 3696.2 Inorganic Chemical Products Preparations of Standard Solutions for Chemical Analysis
HG/T 3696.3 Inorganic Chemical Products Preparations of Reagent Solutions for Chemical Analysis

Contents
Foreword I
1 Scope
2 Normative References
3 Molecular Formula and Molecular Mass
4 Product Classification
5 Requirements
6 Test Methods
7 Inspection Rules
8 Marking and Labeling
9 Packaging, Transportation and Storage
Appendix A (Informative) Technical Differences between This Standard and the Japanese Standard
Appendix B (Informative) Structural Differences between This Standard and the Japanese Standard