On October 24, Hubei Qidi No. 7, No. 8, and No. 9 Chemical Co., Ltd.'s price for white carbon black is 6000 yuan/ton. The specification of the product is industrial grade. The validity period of the quoted price is 7 days. The quote provider is Hubei Qidi No. 7, No. 8, and No. 9 Chemical Co., Ltd.