| abstract |
REFRIGERANTS, REFRIGERATION OILS AND REFRIGERATION-REFRIGERATION OIL MIXTURES CONTAINING ANTHRAQUINONE DYES HAVING THE STRUCTURE 1-R1,4-R2,5-R4,8-R3-ANTHRAQUINONE WHEREIN R1, R2, R3 AND R4 ARE EACH H OR AN ANILINO GROUP, SUBSTITUTED BY FROM 1 TO 3 SATURATED ALKYL GROUPS HAVING A TOTAL OF FROM 4 TO 24 CARBON ATOMS, AND WHEREIN AT LEAST 2 AND NO MORE THAN 3 OF R1, R2, R3 AND R4 ARE H. |