Article · Wikipedia archive · Last revised Jul 3, 2026

Oil Blue 35

Oil Blue 35 is a blue anthraquinone dye used for colouring alcoholic and hydrocarbon based solvents, including oils, fats, and waxes. It is used also in lacquers and inks. In some countries, it is used as a fuel dye. It is also used in some blue colored smoke formulations. In microscopy, it is used as a staining dye. When exposed to 5% hydrochloric acid solution, it becomes dirty green.

Last revised
Jul 3, 2026
Read time
≈ 1 min
Length
192 w
Citations
1
Source
Wikipedia ↗
Oil Blue 35
Structural formula of Oil Blue 35
source ↗
Ball-and-stick model of the Oil Blue 35 molecule
source ↗
Names
IUPAC name
1,4-Bis(butylamino)anthraquinone
Preferred IUPAC name
1,4-Bis(butylamino)anthracene-9,10-dione
Other names
  • Solvent Blue 35
  • Blue 2N
  • Blue B
  • Oil Blue B
  • CI 61554
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.037.602
EC Number
  • 241-379-4
UNII
  • InChI=1S/C22H26N2O2/c1-3-5-13-23-17-11-12-18(24-14-6-4-2)20-19(17)21(25)15-9-7-8-10-16(15)22(20)26/h7-12,23-24H,3-6,13-14H2,1-2H3
    Key: OCQDPIXQTSYZJL-UHFFFAOYSA-N
  • InChI=1/C22H26N2O2/c1-3-5-13-23-17-11-12-18(24-14-6-4-2)20-19(17)21(25)15-9-7-8-10-16(15)22(20)26/h7-12,23-24H,3-6,13-14H2,1-2H3
    Key: OCQDPIXQTSYZJL-UHFFFAOYAW
  • O=C2c1ccccc1C(c3c2c(NCCCC)ccc3NCCCC)=O
Properties
C22H26N2O2
Molar mass 350.462 g·mol−1
Melting point 104–105 °C (219–221 °F; 377–378 K)
insoluble
Solubility acetone, benzene, and toluene
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Oil Blue 351 is a blue anthraquinone dye used for colouring alcoholic and hydrocarbon based solvents, including oils, fats, and waxes. It is used also in lacquers and inks. In some countries, it is used as a fuel dye. It is also used in some blue colored smoke formulations. In microscopy, it is used as a staining dye. When exposed to 5% hydrochloric acid solution, it becomes dirty green.

See also

See also

References

References

  1. "Oil Blue 35 | C22H26N2O2 | ChemSpider". www.chemspider.com. Retrieved 2022-11-23.