Arylsulphonylaminosulphonylphenyl-azo-arylene-azo-phenyl dyestuff

Disazo dyestuff which in the form of the free acid corrresponds to the formula ##SPC17##

• wherein
• R.sub.1 ' is phenyl, C.sub.1 -C.sub.4 -alkyl, or phenyl substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, cyano, or nitro;
• R.sub.2 ' is chlorine, bromine, methoxy, ethoxy, methyl, or ethyl;
• R.sub.3 ' is hydrogen, chlorine, methyl, methoxy, ethyl, or ethoxy;
• R.sub.4 ' is hydrogen, methyl, methoxy, ethyl, or ethoxy;
• R.sub.5 ' and R.sub.6 ' independently of one another, are hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy;
• and
• R.sub.7 ' is phenylsulphonyl, o-, m- or p-tolylsulphonyl, or o-, m- or p-chlorophenylsulphonyl;
• and
• m is a number from 0 to 2.

Disazo dyestuff which in the form of the free acid corresponds to the formula ##SPC18##

• wherein
• R.sub.1 " is phenyl or tolyl;
• R.sub.2 " is hydrogen, chlorine, bromine, methoxy, ethoxy, methyl, or ethyl;
• R.sub.3 " is hydrogen, chlorine, methyl, methoxy, ethyl, or ethoxy;
• R.sub.4 " is hydrogen, methyl, methoxy, ethyl, or ethoxy;
• R.sub.5 " and R.sub.6 ", independently of one another, are hydrogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkoxy;
• and
• R.sub.7 " is phenylsulphonyl or p-tolylsulphonyl.

Disazo dyestuff which in the form of the free acid corresponds to the formula ##SPC19##

• wherein
• B' is 1,4-naphthylene, or 5,6,7,8-tetrahydro-1,4-naphthylene;
• R.sub.1 ' is phenyl, C.sub.1 -C.sub.4 -alkyl, or phenyl substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, cyano, or nitro;
• R.sub.2 ' is hydrogen, chlorine, bromine, methoxy, ethoxy, methyl, or ethyl;
• R.sub.5 ' and R.sub.6 ' independently of one another, are hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy;
• R.sub.7 ' is phenylsulphonyl, o-, m- or p-tolylsulphonyl, or o-, m- or p-chlorophenylsulphonyl;
• and
• m is a number from 0 to 2.

Disazo dyestuff which in the form of the free acid corresponds to the formula ##SPC20##

• wherein
• B' is 1,4-naphthylene or a 5,6,7,8-tetrahydro-1,4-naphthylene;
• R.sub.1 " is phenyl or tolyl;
• R.sub.2 " is hydrogen, chlorine, bromine, methoxy, ethoxy, methyl, or ethyl;
• R.sub.5 " and R.sub.6 " independently of one another, are hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy group;
• and
• R.sub.7 " is phenylsulphonyl or p-tolylsulphonyl.