Industrial Grade vs Food Grade Sodium Metabisulphite: Quality Standards and Usage Guidelines

Sodium Metabisulphite is divided into industrial grade and food grade according to production processes, impurity control and quality standards. The two grades have obvious differences in purity, heavy metal content and applicable scenarios, and grade misselection will lead to product disqualification and safety risks for downstream manufacturers.

 

Industrial grade Sodium Metabisulphite is mainly customized for industrial production scenarios including water treatment, textile bleaching and chemical synthesis. Its purity is generally above 96%, with relatively loose restrictions on trace impurities such as iron and heavy metals. It focuses on reducing performance and bleaching effects, meeting the high-volume and low-cost demand of industrial production lines.

 

Food grade Sodium Metabisulphite implements extremely strict production and testing standards. The purity reaches more than 98%, with heavy metal, arsenic and residual impurity content strictly limited to food safety ranges. All production links comply with GMP production specifications, ensuring no harmful substances remain and fully meeting international food additive access requirements.

 

In terms of usage guidelines, industrial grade products are prohibited from contacting any food, pharmaceutical and edible raw materials. It is only used for industrial auxiliary treatment and environmental protection projects. Food grade products can be directly added to food processing within the specified dosage range, with standardized addition ratios clearly stipulated by international food regulatory authorities.

 

Price and cost differences also exist between the two grades. Food grade Sodium Metabisulphite requires multiple purification and filtration processes, resulting in higher production costs and quotation. Industrial grade products have cost advantages and are more suitable for large-scale industrial procurement. Global buyers need to confirm downstream usage scenarios clearly to select the correct grade and avoid unnecessary losses.