BVDA - Basic Yellow 40

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LATENT FINGERPRINTS

CYANOACRYLATE FUMING

Basic Yellow 40

Basic Yellow 40 is an excellent dye stain for cyanoacrylate. It fluoresces under blue light (use yellow goggles/filters to view and photograph the fluorescence). The solutions can be diluted.

Can wrapper fumed with cyanoacrylate and stained with Basic Yellow 40. Excitation: 450 nm, filter: 495 nm.

Detail of can wrapper fumed with cyanoacrylate and stained with Basic Yellow 40. Excitation: 450 nm, filter: 495 nm.

B-85300, 500 ml bottle with sprayhead

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Chemical information|

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Description

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B-85200

Basic Yellow 40, 100 ml solution in a polyethylene bottle

B-85300

Basic Yellow 40, 500 ml solution (2 g/liter in ethanol), in a spray bottle

B-85250

Basic Yellow 40, 25 grams in a brown glass bottle

IUPAC name: 2-[7-(diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-1,3-dimethyl-1H-benzimidazolium chloride
CAS-Number: 12221-86-2 and 29556-33-0
Type: Coumarin dye
The methanesulfonate salt (mesilate) instead of chloride is also called Basic Yellow 40 and has CAS-no. 35869-60-4. It probably works as well as the chloride in staining cyanoacrylate.