Dear Sir:
  We are Boya (Tianjin) International Ltd, which is mainly dealing in the impport and export of chemical series, including : Sodium Sulphide /Calcium Carbide /Ammonium Chloride /Humic Acid/ Barium chloride/ Dicyandiamide/ Barium Sulfate /Oxalic Acid /Sodium Hydroxide /Sodium Hydrosulfide /Chromium Sulphate /Sodium metabisulfite /Sodium thiosulfate ,etc.
  We have our own manufacture base, and only co-operate with state-owned enterprises and famous factories for our long and regular suppliers ,thus we can make sure the quality and shipping date of the goods for our customers .