Buprenorphine is an opioid used to treat dependence/addiction to opioids, acute pain, and chronic pain. Buprenorphine belongs to a class of drugs called mixed opioid agonist-antagonists. It helps prevent withdrawal symptoms caused by stopping other opioids. Maximum pain relief is generally within an hour with effects up to 24 hours. Product Name: Buprenorphine Cas No: 52485-79-7 Formula: C29H41NO4 Appearance: White powder Purity: above 98.5%