GB434-1995

Methyl bromide technical

溴甲烷原药

GB 434-1995 ist eine gültige verbindliche chinesische Nationalnorm: Methyl bromide technical. Branchencluster: Lebensmittel. Schwerpunkt: Produktsicherheit. Inkrafttreten: 1. Feb. 1996.

Die Anwendbarkeit hängt vom Produktumfang, dem Zertifizierungsweg, Bekanntmachungen der Behörden und Übergangsregeln ab. Fordern Sie eine Übersetzung an oder prüfen Sie die Quelle, bevor Sie diesen Eintrag für Compliance-Entscheidungen nutzen.

Compliance-Überblick

Dieser Überblick ist derzeit nur auf Englisch verfügbar.

Geltungsbereich und Anwendbarkeit

This standard applies to methyl bromide technical, a chemical agent primarily utilized as a fumigant for its insecticidal and fungicidal properties. It specifically covers the raw technical material consisting of methyl bromide and its impurities, explicitly excluding any formulations with added modifiers. Manufacturers and exporters of agricultural fumigants and raw chemical pesticides must comply with this standard.

Technische Anforderungen

GB 434-1995 establishes the physical and chemical criteria for methyl bromide technical, categorizing the product into two quality tiers: Premium Grade and First Grade. The standard dictates specific limits for the active ingredient content, acidity (calculated as HBr), and the maximum allowable content of non-volatile matter. Under normal temperature and pressure, the product's appearance must be a colorless gas, transitioning to a colorless or pale yellow transparent liquid when under pressure or frozen. Strict adherence to these tiered chemical thresholds is mandatory for market acceptance. Additionally, the standard outlines stringent requirements for packaging, transportation, and storage. The product must be stored in dedicated, clean, and dry steel cylinders equipped with copper valves, adhering to a maximum filling limit. Given that methyl bromide is a highly toxic substance, the standard also integrates comprehensive safety protocols, requiring specific protective gear and referencing GB 2890 for filter respirators.

Prüfverfahren

The standard mandates rigorous analytical procedures to verify product compliance. Gas chromatography is the primary method used for both the identification and quantitative determination of methyl bromane content, utilizing an internal standard method as the arbitration route and an area normalization method as an alternative. Furthermore, acid-base titration is employed to determine the acidity of the sample. The non-volatile matter content is evaluated through a controlled evaporation process followed by oven drying and precise weighing. All testing must be conducted using analytical grade reagents to ensure result accuracy.

Häufige Fragen

What products are regulated under GB 434-1995?

This standard regulates methyl bromide technical, a chemical used primarily as a fumigant with insecticidal and fungicidal properties. It applies to the raw technical material without any added modifiers.

Are there any updates from the previous version of GB 434?

GB 434-1995 replaced the older GB 434-82 standard. It establishes updated technical requirements, grading tiers (Premium Grade and First Grade), and testing methodologies for methyl bromide.

What are the specific packaging and safety requirements for methyl bromide under this standard?

The standard mandates specific safety protocols, including packaging in dedicated steel cylinders with copper valves. Users must wear non-rubber protective clothing and use filter respirators compliant with GB 2890 due to the product's high toxicity.

The summary above provides a high-level overview of GB 434-1995. To ensure complete compliance for your chemical or pesticide 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 434-1995 today to access all detailed parameter tables, chromatographic procedures, and safety protocols.

Hinweise zur Anwendbarkeit

Normtyp: Produkt
CCS: G25
ICS: 65.100
Zuständige Behörde: Ministry of Agriculture and Rural Affairs
Technisches Komitee: Ministry of Agriculture and Rural Affairs

Normbeziehungen

Ersetzt:GB 434-1982