Assertion: toluene | /r/HasProperty | contained less than 0.3 % benzene
Facets:
value: since 1955
type: TEMPORAL
Source sentences:
text: Although the toluene used in Germany – especially in photogravure printing – had contained less than 0.3 % benzene since 1955 (Bänfer 1961 ), at which time the incidence of blood disorders caused by exposure to solvents dropped abruptly (Suhr 1975 ), the usual commercial product in other countries contained up to 15 % benzene (NIOSH 1973 ).