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This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization — Part 1: Rules for the structure and drafting of standardizing documents.
This document replaces GB/T 26520-2011 Calcium chloride for industrial use. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB/T 26520-2011:
— The scope has been modified (see Clause 1 herein; Clause 1 of Edition 2011);
— The classifications of calcium chloride dihydrate have been modified (see Clause 5 herein; Clause 5 of Edition 2011);
— The index requirements for pH have been modified (see 6.2 herein; 5.2 of Edition 2011).
— The index requirements of calcium chloride dihydrate Type III have been added (see 6.2 herein);
— The index requirements of the water insoluble matter and iron content of calcium chloride anhydrous and calcium chloride dihydrate have been modified (see 6.2 herein; 5.2 of Edition 2011);
— The determination methods of total alkali chloride, iron content and pH have been modified (see 7.5.2.3, 7.7 and 7.10 herein, 6.6.2.3, 6.8 and 6.11 of Edition 2011);
— The gravimetric method in the determination method of sulfate content has been modified, the visible turbidimetric method has been added (see 7.8; 6.9 of Edition 2011).
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.
This document was proposed by China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of Subcommittee on Inorganic Chemical Industry of National Technical Committee on Chemical of Standardization Administration of China (SAC/TC 63/SC 1).
This document was firstly issued in 2011, and this edition is the first revision.
Calcium chloride for industrial use
1 Scope
This document specifies the product classification, requirements, test methods, inspection rules, marking and labeling, packaging, transportation and storage of calcium chloride for industrial use.
This document is applicable to calcium chloride for industrial use.
Note: This product is mainly used in the removal of ice, snow and dust, anti-freezing, cold prevention of building materials, desiccant, oil exploitation, refrigerant and other industries.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 191-2008 Packaging — Pictorial marking for handling of goods
GB/T 3049-2006 Chemical products for industrial use — General method for determination of iron content — 1, 10-Phenanthroline spectrophotometric method
GB/T 6678 General principles for sampling chemical products
GB/T 6682-2008 Water for analytical laboratory use — Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 23769 Inorganic chemical products — General method for the determination of pH values
GB/T 23844-2019 General method for the determination of sulphate in inorganic chemicals products
HG/T 3696.1 Inorganic chemicals for industrical use — Preparations of standard and reagent solutions for chemical analysis — Part 1: Preparations of standard volumetric solutions
HG/T 3696.3 Inorganic chemicals for industrical use — Preparations of standard and reagent solutions for chemical analysis — Part 3: Preparations of reagent solutions
3 Terms and definitions
No terms and definitions are listed in this standard.
4 Molecular formula and relative molecular mass
Molecular formula:
Calcium chloride anhydrous, CaCl2
Calcium chloride dihydrate, CaCl2·2H2O
Relative molecular mass:
111.0 (calcium chloride anhydrous) (according to 2018 international relative atomic mass)
147.0 (calcium chloride dihydrate) (according to 2018 international relative atomic mass).
5 Classification
Calcium chloride for industrial use is divided into calcium chloride anhydrous, calcium chloride dihydrate and calcium chloride solution.
Calcium chloride anhydrous is divided into Type I and Type II; calcium chloride dihydrate is divided into Type I, Type II and Type III.
6 Requirements
6.1 Appearance: calcium chloride anhydrous and calcium chloride dihydrate are white flake, powder or granular solids; calcium chloride solution is colorless and transparent liquid.
6.2 The test method of calcium chloride for industrial use as specified in this document shall meet those specified in Table 1.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Molecular formula and relative molecular mass
5 Classification
6 Requirements
7 Test methods
8 Inspection rules
9 Marking and labeling
10 Packaging, transportation and storage
