GB1258-2008

Working chemical - Potassium iodate

工作基准试剂碘酸钾

GB 1258-2008 est une norme nationale chinoise obligatoire en vigueur : Working chemical - Potassium iodate. Secteur : Électronique. Thème principal : Sécurité des produits. Entrée en vigueur : 1 juin 2009.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

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Champ d’application

This standard specifies the characteristics, specifications, testing methods, and packaging requirements for working chemical reagents, specifically Potassium iodate ($KIO_3$). It is applicable to the inspection of working chemical reagents used in titration analysis. This standard is mandatory for manufacturers producing Potassium iodate for analytical benchmarking purposes in China. It replaces the previous version GB 1258-1990.

Exigences techniques

The standard outlines stringent physical and chemical requirements for Potassium iodate. The core specifications include strict limits on the mass fraction of $KIO_3$, which must be tightly controlled within a narrow range to ensure analytical accuracy. Additionally, it sets parameters for pH value, clarity, and loss on drying. Compliance with the content determination and specific mandatory clauses is strictly enforced. Furthermore, the standard regulates the maximum allowable limits for various impurities to maintain the reagent's benchmark quality. These impurities include chlorides and chlorates, iodides, sulfates, total nitrogen, iron, and heavy metals (measured as Lead). The standard also references GB 10737 for general rules on content determination using weighing potentiometric titration.

Méthodes d’essai

Testing procedures involve several standardized methods to verify compliance. Content determination is performed using weighing potentiometric titration with a sodium thiosulfate standard volumetric solution. pH value is measured according to GB/T 9724, while clarity is assessed against HG/T 3484. Impurity testing for sulfates, total nitrogen, and iron follows the general methods specified in GB/T 9728, GB/T 609, and GB/T 9739 respectively. Manufacturers must ensure all testing apparatus and solutions meet the grade-three water specifications outlined in GB/T 6682.

Questions fréquentes

What products are regulated under GB 1258-2008?

GB 1258-2008 regulates working chemical reagents, specifically Potassium iodate ($KIO_3$) used as a benchmark in titration analysis.

Are there any mandatory clauses in GB 1258-2008?

Yes, Chapter 4, clause 5.2.1, and clause 5.2.2 are mandatory, while the remaining provisions are recommended. These mandatory clauses cover the specifications and the content determination methods.

What are the packaging and labeling requirements under this standard?

Packaging, storage, and transportation must comply with GB 15346. The label must follow GB 15258 and explicitly state the hazard class as an oxidizer.

The summary above provides a high-level overview of GB 1258-2008. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 1258-2008 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Produit
CCS: G61
ICS: 71.040.30
Autorité compétente: Ministry of Industry and Information Technology
Comité technique: Ministry of Industry and Information Technology

Relations

Remplace:GB 1258-1990