B7-33 is a synthetic single-chain relaxin mimetic derived from the B-chain of relaxin, designed to selectively activate the RXFP1 receptor while reducing affinity for other relaxin receptors. It is supplied as a high-purity white lyophilized powder at >=99% HPLC purity in sealed vials. B7-33 is investigated in research on fibrosis, tissue remodeling and relaxin-receptor signaling, and is commonly applied in cell-culture and preclinical studies. The stable freeze-dried format supports easy reconstitution and reproducible dosing.. Quality control is performed on each batch with batch COA available on request. Keep the product sealed at 2-8 degree C, protected from light and moisture; for long-term storage -20 degree C is recommended and repeated thawing should be avoided. We accept both sample and bulk orders, offer OEM and private label service, and arrange discreet neutral packing for worldwide shipping. Intended for laboratory research only, not for human or veterinary application.