A pharmaceutical composition comprising methoxycarbonyl methyl carbonate (also known as dimethyl dicarbonate) and a pharmaceutically acceptable carrier or diluent. The pharmaceutical composition is for use in treatment or prevention of a skin disease or condition, wherein it is applied by topical administration. Preferably the carrier/diluent is an oil or fat, a natural wax, a petroleum wax, a hydrocarbon or an organic solvent. Also claimed is methoxycarbonyl methyl carbonate for use as a medicament, preferably for the treatment or prevention of human or non-human animal infectious disease, more preferably mastitis. Methoxycarbonyl methyl carbonate for use in wound healing, cicatrisation, dermal disease or a dermal condition is also claimed. Also disclosed is a sterilising, cleaning or disinfecting composition comprising methoxycarbonyl methyl carbonate (also known as dimethyl dicarbonate) in a carrier or diluent. A method of sterilising, cleaning or disinfecting a surface is also claimed, comprising applying said composition to said surface. A wound dressing comprising a wound contact layer comprising methoxycarbonyl methyl carbonate is also disclosed. Preferably the methoxycarbonyl methyl carbonate is coated on a surface of the wound contact layer or incorporated within the wound contact layer.
