Formula: Mixture of Neomycin B & C sulfates (C₂₃H₄₆N₆O₁₃·xH₂SO₄) CAS: 1405-10-3 EC No.: 215-773-1 M (Molar Mass): ~712 g/mol (for Neomycin B base) D (Density): ~1.0 g/cm³ (approx.) mp (Melting Point): Decomposes bp (Boiling Point): Not applicable Optical Rotation: [α]²⁵D +83° to +90° (c=1 in water)

Potency: ≥ 680 µg/mg (as Neomycin base) Appearance: White to yellowish-white powder. Hygroscopic. pH (1% Solution): 5.0 - 7.5 Loss on Drying: ≤ 8.0 % Residue on Ignition: ≤ 1.0 % Sterility Test: Passes test (for bacteriology grade). Biological Activity: Complies with microbiological assay against Staphylococcus aureus or Bacillus subtilis.