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