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NCJRS Abstract

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NCJ Number: 142371 Find in a Library
Journal: Journal of Forensic Identification  Volume:40  Issue:5  Dated:(September/October 1990)  Pages:265-270
Author(s): N E Masters
Date Published: 1990
Page Count: 6
Type: Report (Technical)
Format: Article
Language: English
Country: United States of America
Annotation: Rhodamine 6G has many commercial, scientific, and law enforcement uses, and concern has been raised about its carcinogenicity.
Abstract: Rhodamine 6G is used to dye silk, cotton, wool, leather, bast fibers, and paper. It is also used as a tracing agent in water pollution studies; as an absorption indicator, especially in acidic solutions; in printing inks when mixed with some metallic acid salts; and in soaps, cosmetics, and perfumes which may come into contact with mucous membranes. Latent print specialists and identification technicians also use Rhodamine 6G as a dye. It is applied in a solution of less than 1 gram Rhodamine 6G to 1 liter of methanol to the surface of items of evidence which have been preprocessed with cyanoacrylate ester. The dye adheres to the superglue residue and fluoresces under laser light. This technique renders the ridge structure of developed latent impressions more visible for possible identification. Opinions seem divided on whether Rhodamine 6G is a carcinogen. One study, conducted by the National Toxicology Program, indicates that Rhodamine is toxic but not a human carcinogen. Therefore, law enforcement professionals should handle rhodamine carefully but view it as a useful investigative tool. 24 references
Main Term(s): Laser fingerprint detection; Latent fingerprints
Index Term(s): Criminal investigation; Evidence identification; Forensic sciences; Poisons and poison analysis
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