On October 21, Henan Sai Teng Environmental Protection Technology Co., Ltd. provided a quote for phosphoric acid at 6,600 yuan/ton. The specification of the phosphoric acid is: usage grade: industrial grade; grade: premium quality; content of P(H3PO4) in the phosphoric acid: 85%. The validity period of the quote is three days. The quote provider is Nantong Zhonghe Chemical New Materials Co., Ltd.