RHODAMINE 6G

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Chemical Name:
RHODAMINE 6G
Surface Used On:
Non-porous surfaces.
Sensitive To:
Cyanoacrylate deposit.
Development Color: Method to Record: Hazard: Protective Clothing: Fume Hood Use:

Orange fluorescence

Orange filter

Yes
Reagent Characteristics

Development Complete When:

Source of Error:

Incompatibilities:

Precautions:

Storage Container:

Safety:

Recommendations:


Similar Reagents



Sequential Reagents
(Not necessarily in this order.)



Abridged Reagent Sequence


Visual Examination
|
Forensic Light
|
Cyanoacrylate
|
*** Rhodamine 6G ***
|
Forensic Light
|
R.A.M.
|
Forensic Light

RHODAMINE 6G FORMULA:
Rhodamine 6G Stock Solution 

1 g Rhodamine 6G dissolved in
1 liter Methanol 

Rhodamine Working Solution
(Combine in the order listed.)

  3 ml Rhodamine Stock Solution
 15 ml Acetone
 10 ml Acetonitrile  
 15 ml Methanol 
 32 ml Isopropanol 
925 ml Petroleum ether 

PROCEDURE OF APPLICATION
1.
Spray, dip, or use a squirt bottle
to apply the Rhodamine solution 
to the item.

2.
Examination under a laser or 
Forensic Light Source at 
495 nm to 540 nm.
Absorption Max is at 525 nm.
Use orange or red colored goggles.

3.
Allow the item to air dry.

4.
Photograph results using 
an orange or bandpass 
550(BP35) barrier filter.


Ridge Detail Visualized by:

Forensic Light Source induced.


Reagent Applicabilities:

Post-Cyanoacrylate
Non-Porous surfaces
Fluorescent technique


Other Chemical Name(s):

9-(2-ethoxycarbonyl)phenyl)-3,6-bis(ethyl amino)-2,7-dimethyllxanthylium chloride

Basic red 1


Working Solution Shelf-life:

Six (6) months.

Process Summary:
A fluorescent dye-stain used to enhance cyanoacrylate-developed latent prints. A fluorescent light source that will output light between 495 nm and 530 nm is required for this process.
Accepted Deviations:
The strength (i.e. concentration) of the dye stain may be adjusted to personal preferences. The excitation wavelength may be varied to determine which produces the best fluorescence.
Supporting Reference Materials:
1. Minutiae Magazine, Summer Special 1994, Issue No. 24, pg.7.
2. "Chemical Formulas and Processing Guide for Developing Latent Prints", U.S. Dept. of Justice, pg. 47-48, 1994.

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