Office Location
Shenzhen, China
Production Address
B1501, Meixun Science Park,
No.19, Jinxiu Zhonglu ,
Pingshan.
Durastab Medtec LTD has always adhered to the mission of "making diagnostic reagents more stable and more accurate" since its establishment, and is committed to providing excellent ready-to-use reagent solutions to global advanced medical diagnostic companies.
Until now, Durastab has provided products or services to more than 600 companies and 500 scientific research institutes, of which more than 50 IVD companies are listed companies in China or overseas.
About UsCaseiNSBlock is a casein‑based formulation specifically developed for immunoassays to eliminate nonspecific binding and reduce background, making it suitable for diagnostic kit production. This product can be applied in chemiluminescence, enzyme‑linked immunosorbent assays (ELISA), western blotting, lateral flow assays, and other detection methods.
CaseiNSBlock
CaseiNSBlock is a casein‑based formulation specifically developed for immunoassays to eliminate nonspecific binding and reduce background, making it suitable for diagnostic kit production. Compared to other forms of casein, CaseiNSBlock exhibits high solubility in biological matrices and is ideal for preparing immunoassay buffers, offering superior blocking performance on both membranes and microplates. This product can be applied in chemiluminescence, enzyme‑linked immunosorbent assays (ELISA), western blotting, lateral flow assays, and other detection methods. It can be used to block surfaces such as microspheres, polystyrene microplates, nitrocellulose membranes, or other solid supports, or formulated into a liquid blocking solution to achieve a higher signal‑to‑noise ratio and enhance the sensitivity of immunoassays.
Art no: CNBK
Package size: 100g, 250g, 500g, 1kg, bulk
pH value: 5.4 ~ 6.4 (50 mg/mL in water)
Protein Content: ≥90%
Shelf life: 1 year (2~8℃)/ 5 years (≤ -20℃)
Storage: 2-8℃/ ≤ -20℃
Application:
Western blot / ELISA/ Chemiluminescence/ Microarray/ etc.
Instruction:
For bulk packaging, it can be subdivided into smaller aliquots under clean conditions to avoid contamination risks from repeated opening of the main container.
Preparation of Blocking/Dilution/Working Solution: Weigh the required amount of CaseiNSBlock, dissolve it in the appropriate solution, adjust to the desired pH, and then use or store at 2–8 °C. Adding Tween‑20 or another surfactant at a final concentration of 0.1%–0.5% may further enhance blocking performance.
For research use only or for further use in the production of detection kits. Not for human or animal use!

Committed to providing excellent ready-to-use reagent solutions to global advanced medical diagnostic companies.
Send Request B1501, Meixun Science Park,
No.19, Jinxiu Zhonglu ,
Pingshan.

