Dtnb

Dtnb, also known as 5,5‑dithiobis(2‑nitrobenzoic acid), is supplied as a straw‑yellow powder with an assay of 99.5 %. The product’s molecular formula is C14H12N2O6S2 and it is reported to be highly soluble in a range of organic and aqueous solvents. Nanjing Search Bio Co., Ltd lists the reagent as suitable for biochemical research, particularly for detecting sulfhydryl groups in proteins, and notes that it meets ISO and SGS certification requirements. The supplier’s address is in the Nanjing Economic Development Zone Pharmaceutical Industry Garden, Jiangsu, China.

The reagent conforms to typical purity standards for laboratory‑grade DTNB, where assay values of 98 % or higher are common; this batch exceeds that benchmark. Standard practice for DTNB includes storage in sealed amber containers to protect against light‑induced degradation, and the compound is generally supplied in quantities from 25 g up to several kilograms. Industry users often prefer a molecular weight of approximately 368 g mol‑1, which matches the calculated weight for the given formula. Typical packaging involves a sealed glass bottle with a desiccant packet to maintain stability during transport.

Researchers in pharmaceutical, chemical and academic laboratories purchase DTNB for protein analysis, enzyme activity assays and other molecular biology applications. Nanjing Search Bio Co., Ltd states that it can accommodate both small and large orders, offering FOB or CIF terms depending on buyer preference. Buyers should request a Certificate of Analysis to verify the 99.5 % assay and confirm the presence of ISO/SGS certifications before finalising the contract. Payment methods and exact lead times are not listed and must be clarified directly with the supplier.

Nanjing Search Bio Co., Ltd is located in the Nanjing Economic Development Zone Pharmaceutical Industry Garden, Jiangsu Province, China. The company is listed as an imported‑tier supplier with a harbour‑level trust rating; however, its response rate is currently recorded as 0 % and no average response time is available, indicating that buyers should verify communication readiness before placing orders.

The supplier promotes Dtnb as a high‑purity reagent and highlights that its products carry ISO and SGS certifications. Flexible minimum order quantities are mentioned, and the company is prepared to ship under FOB or CIF incoterms. No additional product lines or corporate history are provided in the source data, so further details must be obtained directly from the supplier.