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	The name of chemical purchased Referenence standard of product Quality target Sodium tangstate - ≥98% Active carbon - ≥200mu Ferrous salfate GB10531-89 Excellent Grade Hydrogen peroxide GB1616-88 ≥27.5% Diethanolamine Zbg17020-89 ≥99% Formaldehyde GB9009-88 Excellent Grade Phosphurous trichloride GB10667-89 ≥98% Excellnt Grade Synthetic Hydrochloric Acid GB320-93 Excellent Grade Sodium hydroxide GB209-93 ≥32.0%

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