This product is a lyophilized powder. Each vial contains 10 µg of interferon-α 2B. This product may be reconstituted in water or PBS.
Please see the links below to review the product datasheet and a sample Certificate of Analysis.
H6166 Datasheet:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/427/523/h6166pis.pdf
H6166 Sample Certificate of Analysis:
https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/H6166-10UG-PWMKCV0319.pdf