Import Direct Red 23 — Buy in Bulk from Supplier in China

Direct red 23 is a synthetic direct dye with the chemical formula C35H25N7Na2O10S2 and CAS number 3441-14-3, supplied as a powder with a strength of 150%. It has a pH value of 7.5 and a density between 1.2 and 1.5 g/cm³. The dye exhibits an oil absorption rate of 30 to 35 ml per 100 grams and is designed for applications in paper, leather, and textile dyeing where water-based application is standard.

This dye belongs to the azo class of direct dyes and is typically used for its bright scarlet shade on cellulosic fibers and paper substrates. Its molecular structure allows for good affinity to cellulose without requiring a mordant. Typical industry standards for direct red dyes include a light fastness rating of 5 to 7 and heat resistance up to 160°C, both of which align with the values provided. The dye is not recommended for applications requiring prolonged exposure to strong acids or alkalis beyond pH 5 to 9.

Buyers in the paper manufacturing, textile printing, and leather finishing sectors commonly source this dye for batch dyeing processes. It is packaged in 25 kg kraft bags, iron drums, or cartons as per buyer specifications. Delivery is prompt, and bulk orders are accepted. Buyers should confirm compatibility with their existing dyeing baths and ensure proper ventilation during handling due to dust generation.

Tianjin Shenyuan Chemical Co., Ltd is a supplier based in Tianjin, China, with a physical address listed at 203 Room203, Tianjin Chentang Technology No.17 Yujiang Road, Hexi District. The company is categorized as an imported supplier with harbor trust tier status, indicating verified export compliance and logistical readiness. There is no public data on company size, years in operation, or client list, and no certifications such as ISO or REACH are referenced in the listing.

The supplier focuses on direct dye products including red 23, 31, 239, 80, 81, 224, 243, 277, 79, and 89. Their operational capacity appears limited to bulk packaging and shipment coordination. Response metrics show no recorded activity, and there are no verified buyer reviews or third-party audits referenced. Buyers should treat this as a transactional supplier with no disclosed quality management system beyond the provided technical data.