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84-40-2

Basic Information
CAS No.: 84-40-2
Name: C.I.Vat Blue 35
Article Data: 24
Molecular Structure:
Molecular Structure of 84-40-2 (C.I.Vat Blue 35)
Formula: C16H8 Br2 N2 O2
Molecular Weight: 420.06
Synonyms: Indigotin,5,5'-dibromo- (6CI); [D2,2'-Biindoline]-3,3'-dione, 5,5'-dibromo- (7CI,8CI); 5,5'-Bromoindigo;5,5'-Dibromoindigo; Brilliant Indigo BRD; Brilliant Indigo KMR; C.I. 73060;C.I. Vat Blue 35; Dibromoindigo; Hostavat Navy 2R; Hostavat Navy BR; HostavatNavy R; Midland Vat Blue R; Midland Vat Blue RG; Mitsui Tsuya Indigo BR;Pharmanthrene Blue R
Density: 1.932±0.06 g/cm3(Predicted)
Melting Point: >300 °C
Boiling Point: 492.0±45.0 °C(Predicted)
Flash Point: 251.3oC
PSA: 58.20000
LogP: 4.61580
Synthetic route
17357-14-1

5-bromo-3-indoxyl acetate

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

75-52-5

nitromethane

20357-20-4

5-bromo-2-nitrobenzaldehyde

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
Stage #1: nitromethane; 5-bromo-2-nitrobenzaldehyde With sodium methylate In methanol
Stage #2: With sodium sulfate; sodium hydroxide In water
56%
32253-75-1

5-bromo-2-<(carboxymethyl)amino>-benzoic acid

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With sodium acetate; acetic anhydride Verseifen des Reaktionsprodukts und nachfolgende Oxydation mit Luft;
29124-56-9

1-(2-amino-5-bromophenyl)ethanone

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With quinoline; sulfur

1-(2-amino-5-bromo-phenyl)-2,2-dibromo-ethanone

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With sodium hydroxide Schuetteln der erhaltenen Loesung mit Luft;

2-(ethoxycarbonylmethyl-nitroso-amino)-5-bromo-benzoic acid ethyl ester

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With potassium hydroxide Behandeln des Reaktionsprodukts im Wasser mit Luft;
20357-20-4

5-bromo-2-nitrobenzaldehyde

67-64-1

acetone

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With sodium hydroxide
With sodium hydroxide
With sodium hydroxide In water
482-89-3

1H,1H'-2,2'-Biindolylidene-3,3'-dione

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With bromine
5.5'-dibromo-dehydroindigo diacetate

5.5'-dibromo-dehydroindigo diacetate

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
durch Reduktion;
5-bromo-isatin chloride

5-bromo-isatin chloride

84-40-2

5,5'-dibromo-1H,1'H-[2,2']biindolylidene-3,3'-dione

Conditions
ConditionsYield
With hydrogen iodide; sulphurous acid; acetic acid
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