Описание на русском · Доступен перевод
GB12597-2008
Working chemical - Benzoic acid
工作基准试剂 苯甲酸
GB 12597-2008 — действующий обязательный национальный стандарт Китая: Working chemical - Benzoic acid. Отрасль: Электроника. Тема: Безопасность продукции. Дата вступления в силу: 1 июн. 2009 г..
Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.
Обзор требований
Этот обзор пока доступен только на английском языке.
Область применения
This standard is applicable to the inspection of working chemical benzoic acid used in titration analysis. It specifies the properties, specifications, testing methods, inspection rules, and packaging requirements for this specific chemical reagent. It is mandatory for manufacturers producing working-grade benzoic acid for analytical purposes in China. The standard is not intended for general industrial or food-grade benzoic acid.
Технические требования
The standard outlines the physical and chemical specifications for working chemical benzoic acid. It mandates strict purity requirements, with the content of C6H5COOH required to fall within a highly specific range. Additionally, the standard sets limits on the melting point range and clarity of the reagent. Compliance with these physical parameters is essential to ensure the reagent's reliability as a titration standard. Regarding chemical impurities, the standard defines maximum allowable limits for several critical categories, including ignition residue, chlorine compounds, and sulfur compounds. It also restricts the presence of trace metals such as iron and heavy metals (as Pb). Manufacturers must ensure their products meet these stringent impurity thresholds to qualify as working-grade reagents. Furthermore, the standard specifies requirements for reducing potassium permanganate substances and easily carbonizable substances. These parameters ensure the chemical stability and purity of the benzoic acid during analytical procedures.
Методы испытаний
The testing procedures involve several standardized methods to verify compliance. The content determination is performed using a gravimetric potentiometric titration method, referencing GB 10737-2007. Melting point range is measured according to GB/T 617. Impurity tests for chlorides, sulfates, and iron follow the general methods outlined in GB/T 9729, GB/T 9728, and GB/T 9739, respectively. All tests must be conducted using reagents and water meeting the specified grade requirements to ensure accuracy.
Частые вопросы
What products are regulated under GB 12597-2008?
GB 12597-2008 regulates working chemical benzoic acid specifically used for titration analysis. It does not apply to industrial or food-grade benzoic acid.
Are there any updates from the previous version of GB 12597-2008?
Yes, this version replaces GB 12597-1990. The main changes include the modification of the standard name to 'Working chemical-Benzoic acid' and an update to the content determination method.
Is GB 12597-2008 a mandatory standard?
Yes, Chapter 4 and clauses 5.3.1 and 5.3.2 of GB 12597-2008 are mandatory, while the other provisions are recommended.
The summary above provides a high-level overview of GB 12597-2008. 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 12597-2008 today to access all detailed parameters, tables, and testing procedures.
Подсказки по применимости
- Тип
- Продукция
- CCS
- G61
- ICS
- 71.040.30
- Компетентное ведомство
- Ministry of Industry and Information Technology
- Технический комитет
- Ministry of Industry and Information Technology
Связи
Заменяет:GB 12597-1990