Latent Fingerprints

ULTRA PURE CSI DFO
DFO (1,8-Diazafluoren-9-one) is a reagent that (like ninhydrin) reacts with the amino acids present in fingerprints.
The areas of applica on are the same: porous surfaces like paper, unpainted wood and the like.
A fingerprint developed with DFO is less visible in white light than a er treatment with ninhydrin but with
green light (about 530 nm), it fluoresces strongly. The fluorescence is viewed and photographed through
orange or red filter (goggles). Our DFO is prepared exclusively for Crime Sciences Inc. by the Casali Ins -
tute of Applied Chemistry. Purity makes the difference, and our DFO is of the highest purity (>99%), with
each batch analyzed by HPLC, with a cer ficate of analysis available. Don’t take a chance: eliminate one
more poten al variable in your formula on, by only using our highest purity material. We can supply any
size vial you require!
CS-0128-025 DFO (1,8-diazafluoren-9-one), 0.25g
CS-0128 DFO (1,8-diazafluoren-9-one), 1 g
CS-0128-5 DFO (1,8-diazafluoren-9-one), 5 g
CS-0128-10 DFO (1,e-diazafluoren-9-one), 10g
ULTRA PURE CSI 1,2-Indanedione
Indanediones can visulalize latent fingerprints as well as, or even be er than, DFO. Its ease of prepara
on, lower cost, and good solubility make it an excellent addi on to your fingerprint development
arsenal. Professor Yosef Almog, former head of the Israel Police division of iden fica on
and forensic science (DIFS) and now a researcher at the Casali Ins tute of Applied Chemistry, coordinated
the team that developed the reagent, including Professor Madeleine Joullié and her graduate
students, Dr. Diane Hauze and Dr. Olga Petrovskaia, from the University of
Pennsylvania (Upenn). During the evalua on of the compounds at the
U.S. Secret Service (USSS) by Dr. Tony Cantu and Robert Ramotowski, it
was discovered that these compounds were also capable of visualizing
latent prints. The powdered compound is very stable. However,
working solu ons should be made up whenever needed and should not be kept for extended periods. Like Ninhydrin,
latent prints visualized with Indanediones can be treated with zinc chloride to slow the fading of visible and luminescent
detail. In general, an increase in fluorescence is also observed a er treatment with zinc chloride. Prints developed
this way fluoresce at 530 nm like DFO, and can be viewed with a filter at 570 to 590 nm. Picture on le shows a
fingerprint cut in half, and treated with DFO on le side, and 1,2-IND on right side, under green light.
CALL FOR A COMPLETE PAPER ON 1,2-INDANEDIONE - we can supply any size vial you require!
CS-0130-025 1,2-Indanedione, 0.25 gm
CS-0130 1,2-Indanedione, 1 gm
CS-0130-5 1,2-Indanedione, 5 gm
CS-0130-10
1,2-Indanedione, 10 gm
Adhesive-Side Developer DARK 7 oz (210ml)
For developing latent prints on the adhesive side of tape, ASD7D and ASD7L are pre-mixed,
thick liquids that are applied to the surface with the dauber applicator. Can be used to develop
prints from masking, duct, clear, cellophane, brown packaging and nylon reinforced
strapping tapes. The SI-ASD7D is 7 oz. dark.
The SI-ASD7L 7 oz is light.
SI-ASD7D dark SI-ASD7l light