Oil Red O

Oil Red O
Identifiers
CAS number 1320-06-5
PubChem 5841742
ChemSpider 14217961 YesY
MeSH oil+red+O
Jmol-3D images Image 1
Properties
Molecular formula C26H24N4O
Molar mass 408.49496
 YesY Red O (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Oil Red O (Solvent Red 27, Sudan Red 5B, C.I. 26125, C26H24N4O) is a lysochrome (fat-soluble dye) diazo dye used for staining of neutral triglycerides and lipids on frozen sections and some lipoproteins on paraffin sections. It has the appearance of a red powder with maximum absorption at 518(359) nm.

Contents

Uses

Oil Red O is one of the dyes used for Sudan staining. Similar dyes include Sudan III, Sudan IV, and Sudan Black B. The staining has to be performed on fresh samples, as alcohol fixation removes the lipids.

Oil Red O largely replaced Sudan III and Sudan IV, as it provides much deeper red color and the stains are therefore much easier to see.

In pyrotechnics, Oil Red O is used in some compositions of red colored smokes. It is also used to dye some plastics, e.g. polystyrene resins.

Forensic

When staining, Oil Red O can make fat more visible in various cuts in pathology.[1]

It is also used in a technique (the method is called as the dye: Oil Red O), discovered in 2004 by Alexandre Beaudoin, for staining latent fingerprints.[2] This technique allows the development of latent fingerprints on porous exhibits (such as paper, cardboard, etc.) that are dry or wet.

It mainly targets fat deposits on the surface of porous exhibits.[3] It is a non-destructive technique (which does not destroy the exhibit and doesn’t prevent the use of other techniques).

It is a safe alternative to the Physical Developer method,[4] and is also used in sequence with other methods of fingerprints development.[5]

References

  1. ^ "Forensic Pathology". http://library.med.utah.edu/WebPath/FORHTML/FOR002.html. 
  2. ^ Triplett M, Fingerprint Dictionary, Two Rings Publishing, Bellevue, Washington.
  3. ^ Beaudoin, A. New technique for revealing latent fingerprints on wet, porous surfaces: Oil Red O. Journal of Forensic Identification, 2004, 54 (4), 413-421.
  4. ^ Rawji, A. ; Beaudoin, A. Oil Red O versus Physical Developer on wet papers: a comparitive study. Journal of Forensic Identification, 2006, 56 (1), 33-54.
  5. ^ Guigui, K.; Beaudoin, A. The use of Oil Red O in sequence with other methods of fingerprint development. Journal of Forensic Identification, 2007, 57 (4), 550-581.

External links


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Oil Red O — Général Nom IUPAC 1 ((4 (2,5 diméthylphényl)diazènyl 2,5 diméthylphényl)hydrazinylidène)naphthalèn 2 one Synonymes …   Wikipédia en Français

  • oil red — noun Usage: often capitalized O&R : any of several oil soluble red dyes see dye table I (under Solvent Red 26 and 27) …   Useful english dictionary

  • oil red O — a red diazo dye that is more soluble in fat than in water or alcohols; used as a stain for neutral fats …   Medical dictionary

  • oil red — Sudan III …   Medical dictionary

  • oil red IV — scarlet r …   Medical dictionary

  • Red ochre — and yellow ochre (pronounced /IPA| əʊk.ə/, from the Greek ὄχρος, yellow) are pigments made from naturally tinted clay. It has been used worldwide since prehistoric times. Chemically, it is hydrated iron (III) oxide.Ochres are non toxic, and can… …   Wikipedia

  • Red Sails in the Sunset — can refer to:* Red Sails in the Sunset (album), a 1984 album by Midnight Oil * Red Sails in the Sunset (song), a popular song recorded by many artists …   Wikipedia

  • Red vitriol — Vitriol Vit ri*ol, n. [F. vitriol; cf. Pr. vitriol, vetriol, Sp. & Pg. vitriolo, It. vitriuolo; fr. L. vitreolus of glass, vitreus vitreous. See {Vitreous}.] (Chem.) (a) A sulphate of any one of certain metals, as copper, iron, zinc, cobalt. So… …   The Collaborative International Dictionary of English

  • Oil of vitriol — Vitriol Vit ri*ol, n. [F. vitriol; cf. Pr. vitriol, vetriol, Sp. & Pg. vitriolo, It. vitriuolo; fr. L. vitreolus of glass, vitreus vitreous. See {Vitreous}.] (Chem.) (a) A sulphate of any one of certain metals, as copper, iron, zinc, cobalt. So… …   The Collaborative International Dictionary of English

  • Red oil — is defined as a substance of varying composition formed when an organic solution, typically tri n butyl phosphate (TBP, an agent used for extracting heavy metals in nuclear reprocessing plants) and its diluent, comes in contact with concentrated… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.