GB2549-2003

Dichlorvos technical

敌敌畏原药

GB 2549-2003 é uma norma nacional chinesa obrigatória vigente: Dichlorvos technical. Setor: Alimentos. Foco: Segurança de produtos. Entrada em vigor: 1 de jun. de 2004.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to dichlorvos technical, an organophosphate insecticide, consisting of the active ingredient and its manufacturing impurities. It is applicable to manufacturers and importers of this specific pesticide technical material in China. It does not apply to formulated dichlorvos products or emulsifiable concentrates. The standard replaces the previous version GB 2549-1981(1989) and introduces unified quality specifications without grade classifications.

Requisitos técnicos

The standard mandates specific physical and chemical parameters for dichlorvos technical. Appearance must be an amber to colorless transparent liquid free of visible foreign impurities. Key control items include the active ingredient content, which must meet a minimum threshold, and the acidity level, calculated as sulfuric acid. The standard also sets strict limits on moisture content to ensure chemical stability. A significant update in this version is the addition of a trichloroacetaldehyde control project, a critical impurity monitor, while removing the previously required trichlorfon control. Compliance with these chemical thresholds is mandatory for all production batches. The standard references GB/T 1600 for moisture determination and GB 3796 for packaging requirements.

Métodos de ensaio

Testing protocols involve gas chromatography (GC) with a flame ionization detector for quantifying the active ingredient and trichloroacetaldehyde, utilizing specific internal standards like n-pentadecane and toluene respectively. Identification is confirmed via GC retention time matching and infrared spectroscopy. Acidity is determined through acid-base titration using a sodium hydroxide standard solution, while moisture is measured via the Karl Fischer method.

Perguntas frequentes

What products are regulated under GB 2549-2003?

GB 2549-2003 regulates dichlorvos technical (the unformulated active ingredient), specifying its quality, testing methods, and packaging requirements for the Chinese market.

Are there any updates from the previous version of GB 2549?

Yes, this version cancels product grading, unifies the dichlorvos content requirement, modifies the acidity index, adds a trichloroacetaldehyde control project, and removes the trichlorfon control project. The internal standard for dichlorvos testing was also changed to n-pentadecane.

What are the packaging and storage requirements for dichlorvos technical?

The product must be packaged in clean, dry iron drums (typically 25kg or 200kg) according to GB 3796. It must be stored in ventilated, dry warehouses, strictly protected from moisture and sunlight, and kept separate from food, seeds, and feed.

The summary above provides a high-level overview of GB 2549-2003. 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 2549-2003 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: G25
ICS: 65.100.10
Órgão competente: Ministry of Agriculture and Rural Affairs
Comitê técnico: Ministry of Agriculture and Rural Affairs

Relações

Substitui:GB 2549-1981