Imperial Chemical Industries Limited

John Laurence Carey

Colin William Greenhalgh

David F Newton

Dyestuffs having the general formula: ##STR1## wherein Z.sup.1 and Z.sup.2 each independently represent oxygen or ##STR2## in which Y is hydrogen, an optionally substituted hydrocarbon radical or an acyl radical,

Substituted 2,7-dioxo-2,7-dihydrobenzo[1:2-b; 5:6-b.sup.1 ]difuran or

Substituted 2,6-dioxo-2,6-dihydrobenzo[1:2-b, 4:5-b']difurans or -dipyrroles and processes for their manufacture. The compounds are dyestuffs which are particularly useful in the form of aqueous dispersions for application to polyester textile materials.

Benzodipyrrole dyestuffs

Substituted 2,6-dioxo-2,6-dihydrobenzo[1:2-b, 4:5-b.sup.1 ]difurans or -dipyrroles and processes for their manufacture. The compounds are dyestuffs which are particularly useful in the form of aqueous dispersions for application to polyester textile materials.

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Manchester, United Kingdom

John Laurence Carey