StructureCrystal violet lactone (CVL)
CAS No. 1552-42-7
EC No. 216-293-5
Synonyms 3,3-Bis(p-(dimethylamino)phenyl)-6-(dimethylamino)phthalide; 6-(dimethylamino)-3,3-bis(4-(dimethylamino)phenyl)-1(3H)-isobenzofuranone; 6-(dimethylamino)-3,3-bis(p-(dimethylamino)phenyl)phthalide; crystal violet lactone; CVL

Crystal violet lactone (CVL)

​Crystal violet lactone (CVL) is a color former for use in carbonless copying paper.


CVL is suitable for use as a color former in most carbonless paper applications. Main component of blue image formulations. Shading component for black image formulations.

  • Compatible with most commonly used capsule technologies
  • Soluble in most commonly used capsule oils
  • High color strength

CVL develops a neutral to slightly reddish-blue shade on clay, phenolic resin and zinc salicylate papers. It has has a good light fastness on phenolic resin and zinc salicylate papers and moderate light fastness on clay papers. On phenolic resin and zinc salicylate papers the image fades slightly in shade. On clay papers the image fades towards green.


Shelf Life

Under proper storage conditions, the shelf life is 18 months

Health & Safety

Detailed information on the product described can be found in our relevant Health and Safety Information (Material Safety Data Sheet)