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(Description)
(Other Properties)
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CI Natural Red 28; archil; orchil; lacmus;
 
CI Natural Red 28; archil; orchil; lacmus;
  
== Other Properties ==
+
== Physical and Chemical Properties ==
(include all available properties for the characterization or stability of the material including solubility, absorption wavelengths, lightfastness classification, microscopic appearance.  If available, fill out the wikitable.  Delete lines for unavailable information)
 
  
 +
Orcein is soluble in ethanol. It is an indicator dye that turns blue in alkaline solutions.
  
 
{| class="wikitable"
 
{| class="wikitable"
|-
 
! scope="row"| Composition
 
| C16H10N2O2
 
 
|-
 
|-
 
! scope="row"| CAS
 
! scope="row"| CAS
| 482-89-3
+
| 1400-62-3
|-
 
! scope="row"| Melting Point
 
| 390-392
 
|-
 
! scope="row"| Molecular Weight
 
| mol. wt. = 262.26
 
|-
 
! scope="row"| Refractive Index
 
| >1.662
 
 
|}
 
|}
  

Revision as of 10:48, 26 June 2020

Description

The chemical name for dyes extracted from seeral species of lichen, commonly known as "Orchella weeds"

Orchil dyed wool
Image credit w. Carter

Synonyms and Related Terms

CI Natural Red 28; archil; orchil; lacmus;

Physical and Chemical Properties

Orcein is soluble in ethanol. It is an indicator dye that turns blue in alkaline solutions.

CAS 1400-62-3

Hazards and Safety

(Include all Hazards, Health and Safety information, and links to MSDS sheets)

Fisher Scientific: MSDS

Additional Information

(Place no more than three expert sources for the reader to access for more information)

° H.Schweppe, "Indigo and Woad", Artists Pigments, Volume 3, E. West FitzHugh (ed.), Oxford University Press: Oxford, 1997.

° Pigments Through the Ages: Indigo

Comparisons and related information

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Characteristics of Common Blue Pigments

Additional Images

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Sources Checked for Data in Record

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