T/JSAS 082-2026 By-product 25% sodium sulfite aqueous solution

Scope

This document specifies the requirements, test methods, inspection rules, and marking, packaging, transportation, and storage for 25% sodium sulfite aqueous solution, a by-product used in comprehensive utilization processes. This document applies to the 25% sodium sulfite aqueous solution (hereinafter referred to as the product) obtained by absorbing sulfur dioxide with liquid alkali during the production of tetramethylthiazole sulfate, which is mainly used as a raw material for the production of industrial sodium metabisulfite. Factory Inspection 6.2.1 The product shall be inspected and certified by the quality inspection department of the manufacturer in accordance with this document before it can be shipped from the factory. 6.2.2 The inspection items for factory inspection include appearance, sodium sulfite content, and chloride. Type Testing 6.3.1 Type testing shall be conducted under the following circumstances: a) When the product is produced in batches for the first time; b) When there are major changes in raw materials, formulations, or processes that may affect product quality; c) When there are significant differences between the results of factory inspection and those of the last type testing; d) When production is resumed after a suspension of more than half a year; e) When normal production has been ongoing for one year. 6.3.2 The type testing items include all the contents in Tables 1 and 2 of Chapter 4 of this document. Batch Formation Products from each production cycle constitute a batch. Sampling Sampling shall be conducted in accordance with the provisions of GB/T 6680-2003 Section 7.1. The total amount of samples shall be no less than 500 mL. After mixing the samples evenly, they shall be divided into two parts and labeled with the product name, production date (batch number), sampling date, and sampler's name. One part shall be used for inspection, and the other part shall be kept for reference. Judgment 6.6.1 For the test results obtain

Development Information

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