GB/T 2946-2018Ammonium chloride (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 2946-2008 "ammonium chloride", and the main technical changes compared with GB/T 2946-2008 are as follows.

--- Increased the limit requirements for arsenic, cadmium, lead, chromium, mercury and their compounds for agricultural ammonium chloride (see Table 2);

--- Adjusted the nitrogen content of agricultural ammonium chloride, moisture, granularity of granular products and sodium salt requirements (see Table 2);

--- Increase the average crushing force requirements of granular ammonium chloride for agricultural use (see Table 2);

--- The maximum batch size of the product is adjusted from 500t to 1000t (see 6.2);

--- Added tons of bag packaging specifications (see 8.2).

1 Scope

This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, and transportation of industrial ammonium chloride and ammonium chloride for agriculture. Loss and storage.

This standard applies to agricultural ammonium chloride used as a fertilizer produced by various processes, and used for dry batteries, electroplating, dyeing, precision casting Other aspects of industrial ammonium chloride.

Molecular formula. NH4Cl

Relative molecular mass. 53.49 (according to 2016 international relative atomic mass)

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

Determination of ammonia nitrogen content in GB/T 3600 fertilizers

GB/T 6679 Solid Chemical Products Sampling General

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values

GB/T 8569 solid chemical fertilizer packaging

GB/T 8572 Compound fertilizers - Determination of total nitrogen content

Determination of free water content in GB/T 8577 compound fertilizers Karl Fischer method

GB/T 10209.4 Determination of monoammonium phosphate and diammonium phosphate - Part 4

GB 18382 Fertilizer identification content and requirements

GB/T 23349 Fertilizers arsenic, cadmium, lead, chromium, mercury ecological indicators

HG/T 2843 Chemical analysis of chemical fertilizer products commonly used standard titration solution, standard solution, reagent solution and indicator solution

3 Product Categories

Divided into industrial ammonium chloride and agricultural ammonium chloride.

4 Requirements

4.1 Appearance. white crystalline or granular product.

4.2 Industrial ammonium chloride should meet the requirements of Table 1, and should also meet the value indicated in the packaging bag.

4.3 Ammonium chloride for agricultural use shall comply with the requirements of Table 2 and shall comply with the values indicated in the packaging bag. […]