TECHNICAL DATA FWT RED

Bright Dyes FWT Red liquid products are specially formulated versions of Rhodamine WT dye for convenient use in water tracing and leak detection studies. This bright, fluorescent red dye is certified by NSF International to ANSI/NSF Standard 60 for use in drinking water. It may be detected visually, by ultraviolet light and by appropriate fluorometric equipment. Today it is most often used visually. Visually the dye appears bright pink to red, depending on its concentration and under ultraviolet light as bright orange.

The dye is resistant to absorption on most suspended mater in fresh and salt water. Compared to Bright Dyes FLT Yellow/Green products it is significantly more resistant to degradation by sunlight and when used in fluorometry, stands out much more clearly against background fluorescence. As always the use and suitability of these products for any specific application should be evaluated by a qualified hydrologist or other industry professional.

General Properties	Tablets	FWT Red 25 Liquid	Powders
Detectability of active ingredient 1	Visual <100 ppb	Visual <100 ppb	Visual <100 ppb
Maximum absorbance wavelength 2	550/588 nm	550/588 nm	550/588 nm
Appearance	Dark red convex 1.6cm diameter	Clear, dark red aqueous solution	Dark red fine powder
NSF, max use levels in potable water	0.3 ppb	0.8 ppb	0.1 ppb
Weight	1.05 gms + 0.05	n/a	n/a
Dissolution Time 3	50% < 3 minutes 95% < 6 minutes	Immediately	50% < 3 minutes 95% < 6 minutes
Specific Gravity	n/a	1.03 + 0.05 @ 25¡ C	n/a
Viscosity 4	n/a	1.8 cps	n/a
pH	n/a	8.7 + 0.5 @ 25¡ C	n/a
Coverage of Products	One Tablet	One Pint Liquid (FWT Red 25)	One Pound Powder
Light Visual (100 ppb)	604 gallons	31,250 gallons	604,000 gallons
Strong Visual (1 ppm)	60 gallons	3,125 gallons	60,400 gallons

Caution: These products may cause irritation and/or staining if allowed to come in contact wit the skin. The use of gloves and goggles is recommended when handling this product, as with any other dye or chemical.

To our best knowledge the information and recommendations contained herein are accurate and reliable. However, this information and our recommendations are furnished without warranty, representation, inducement, or license of any kind, including, but not limited to the implied warranties and fitness for a particular use or purpose. Customers are encouraged to conduct their own tests and to read the material safety data sheet carefully before using.