1. Basic Product Identification Name: Buprenorphine Class: Semi-synthetic opioid (partial agonist) ATC Code: N02AE01 Molecular Formula: C₂₉H₄₁NO₄ Molecular Weight: 467.6 g/mol Appearance: White or off-white crystalline powder Solubility: Slightly soluble in water, soluble in ethanol Key Feature: High-affinity partial μ-opioid receptor ag