Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3252423A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF Schweiz AG
Original Assignee
Gesellschaft fuer Chemische Industrie in Basel CIBA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gesellschaft fuer Chemische Industrie in Basel CIBAfiledCriticalGesellschaft fuer Chemische Industrie in Basel CIBA
Priority to GB3252423ApriorityCriticalpatent/GB226373A/en
Publication of GB226373ApublicationCriticalpatent/GB226373A/en
Thioindigoid dyes are obtained by treating with oxidizing agents nuclear halogen substitution products of 2 : 3-naphthioindoxyl; the latter are produced according to the process described in Specification 216,347. In an example, dyestuffs dyeing cotton in fast blue shades from the vat are obtained by blowing air through a caustic soda solution of p 1-brom- or 1-chlor-2 : 3-naphthioindoxyl; other oxidizing agents such as potassium ferricyanide may be used.
GB3252423A1923-12-291923-12-29Manufacture of vat-dyestuffs
ExpiredGB226373A
(en)