Monosyn is a sterile synthetic absorbable monofilament surgical suture produced from a copolymer of 72% glycolide, 14% ε-caprolactone, 14% trimethylenecarbonate. Monosyn is dyed violet with the dyestuff D&C Violet No 2 (colour index number 60725), but is also available undyed (beige). Monosyn fulfils all the requirements of the European Pharmacopoeia and of the United States Pharmacopoeia for sterile, synthetic absorbable monofilament sutures, except for minor variations in suture diameter.