DFTB-C7PK4 Four Pack of Fluorescent Red EPA Approved UV Dye Tabs

(No reviews yet) Write a Review
3.00 Ounces
Calculated at Checkout

Bulk discount rates

Below are the available bulk discount rates for each individual item when you purchase a certain amount

Buy 2 - 10 and get 5% off
Buy 11 - 20 and get 10% off
Buy 21 - 50 and get 15% off
  • Leak detection dye pills DFTB-C7PK4 that dissolve in water and glow red under black light
  • DFTB-C7PK4 Four Pack of Fluorescent Red EPA Approved UV Dye Tabs
  • DFTB-C7PK4  pack of four leak detection tracer dye pill that glow red under UV light
  • DFTB-C7PK4 UV Red 4 pack of black light fluorescent dye pill to make 60 gallons of water
MSRP: $14.45
— You save $4.50


Ordering Part Number: DFTB-C7PK4
Name: Pack of 4 Tablets of Fluorescent FWT Red Pills
Fluorescent: Yes
NSF Certified: Yes
Safety Data Sheet: sds-DFTB-C7PK4 - Email Us or use Contact Form
Strong Visual (1 ppm): 60 Gallons

Risk Reactor Inc. Proudly Offers 4 tablet pack of DFTB-C7PK4 Visible Fluorescent Red FWT  Powder tracer is a specially formulated version of Rhodamine WT dye for convenient use in water tracing and leak detection studies. This bright, fluorescent red dye is certified to ANSI 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 our DFTB-C8 Yellow/Green product, 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.

DFTB-C7PK4 Fluorescent Dye Tab is Certified To Meet EPA Standards and NSF Certified for Drinking Water.

    * Red offers greater contrast to heavy concentrations of green algae.
    * If the water were yellow Risk Reactor FWT Red would be best.
    * It’s fluorescent properties offers greater apparent contrast than non-fluorescent blue.
    * May be used for visual, ultraviolet* and fluorometric* inspections.
    * Has a higher light fastness than FLT Yellow/Green.
    * Resistant to the absorption of suspended matter.
    * Best for moderate to large volumes of water, more than 20,000 gallons.
    * May be used for visual, ultraviolet* and fluorometric* inspections.
    * Very rapid rate of dispersion.

Dye Tablets: May be dropped or flushed directly into drains, sewers or other points in the system. However, it may be desirable to dissolve them in a small amount of water to form a calculated concentration prior to use. Special larger shapes (cakes cones, and donuts) have been designed to provide optimum dissolution rates in large systems. Donuts are frequently suspended from a line or string into the body of water. Cakes and donuts are sealed in a handy water-soluble film for ease of use.

Note: Risk Reactor's DFTB-C7PK4 Red has the highest degree of light stability and is recommended for yellow and/or green backgrounds, such as algae rich waters. Sandy soil will not absorb our Red or yellow green. Color is visible in clear water at one part per million.

Benefits of Risk Reactor Inc.'s DFTB-C7PK4 UV Red Water Based Tracer:

Perfect for bodies of water where there is a high concentration of green algae!
It is clear when diluted preventing stains and other unwanted marks!
Because of the fluorescent nature, DFTB-C7200PACK offers greater contrast than non-fluorescent tracers!
Fluoresces under long wave black light!
Safe and non-toxic!
High strength formulations for medium to large scale visual and fluorometric studies!
Most appropriate fluorescent products for quantitative analysis!
Can be used with our SUPERTAC-365 Hand Held Black Light for mobility!Highly concentrated saving you money!
Bio Degradable!
Can be detected using one of our (portable battery operated ones available) black lights at significantly lower levels such as in the range of 10 ppb in ideal conditions!
Can be used with UV sensors for automation!

Used In:

- Plumbing Tracing.
- Retention Time Studies.
- Flow mapping and rate of flow studies.
- Condenser coil and tube studies.
- Power plant piping tracing.
- Septic system analysis.
- Pollution Studies.
- Leak Detection in many fluid carrying systems.
- Lake river and pond analysis.
- Check for illegal connections.
- Storm and sewer drain analysis.

- Airport Authorties.
- Consumer conservation programs.
- Forestry management agencies.
- Geological surveys.
- Health departments.

- Water consultants and management firms.
- Plumbers and contractors.
- Well drilling and service providers.
- Universities and colleges.
- Zoos, and other governmental agencies.

General Properties

Tablets  DFTB-C7200PACK



Detect ability 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


Dark red convex 1.6cm diameter

Clear, dark red aqueous solution

Dark red fine powder

max use levels in potable water

0.3 ppb

0.8 ppb

0.1 ppb


1.05 gms ± 0.05



Dissolution Time 3

50% < 3 minutes
95% < 6 minutes


50% < 3 minutes
95% < 6 minutes

Specific Gravity


1.03 ± 0.05 @ 25°C


Viscosity 4


1.8 cps




8.7 ± 0.5 @ 25°C


Coverage of Products

One Tablet 

One Pint Liquid 

One Pound Powder

Light Visual (100 ppb)

604 gallons

31,500 gallons

604,000 gallons

Strong Visual (1 ppm)

60 gallons

3,125 gallons

60,400 gallons

How to Use Black Light Fluorescent Tracer Tabs:
How Fluorescent Dye Tracing Products Work: The "visual" aspect of our dye products refers to normal reflection of light as color. The "fluorescent" aspect refers to special properties of some chemicals to absorb certain wavelengths and then emit, rather than reflect, light in response. The emission can be seen by using a "black" ultraviolet light or precisely measured with a fluorometer. The reflected and emitted light have different wavelengths and are, therefore, not the same color.

Fluorescent Properties are of Greatest Value When:

- Tracing must be done when there is no sun or sufficient artificial light (in a sewer or a cave, for instance)

- Precise quantified data is required.

- Very small amounts of tracing material is allowed.

The maximum Absorbance/Emission Wavelengths of Our Products are:

Product Color: Red

Absorption Emission: 550 nm 588 nm  

What Does PPB Mean? Most of our products contain fluorescent dyes, which can be detected visually, or with the use of ultraviolet light or fluorometer. As used in Risk Reactor literature, "ppb" refers to one part of active dye per billion parts of water. Using a fluorometer, the active dye can often be detected at levels less than one ppb. All data is presented as reference points only and should not be regarded as a recommendation. Users should make their own determination of appropriate dilution levels in any specific situation, which will vary with the nature, condition, and use of the water or liquid and the specific evaluation to be performed.

For Stream Tracing and Pollution Detection: Introduce tracers into the water at the source or suspected source of pollution. Allow sufficient time as calculated, to permit the dye tracer to reach the effluent or recipient location. Take samples of water for analysis.

Light Stability: Red is recommended for yellow and green backgrounds such as algae rich water. Red, blue, and yellow green should be used in water bearing heavy sediment loads or when passing through soil with high clay content. Industrial red will absorb onto either. Photo degradation takes place in sunlight at different rates for different dyes. Red takes from approximately five to seven days and yellow green fades in two to three days. Blue, on the other hand, breaks down in three to four weeks. The color of all dyes will disappear if the solution is mixed with chlorine. Add approximately 4 grams of 12% bleach to every gram of product in solution.

View AllClose

Warranty Information

This unit is warranted to be free from material and workmanship defects for a period of thirty (30) days from the date of original purchase. Supplier's limit of liability under this warranty is to repair or replace the product at Supplier's option. Consequential costs such as, but not limited to, loss of use, loss of time or freight charges are not covered. Any product that has been abused, altered, tampered or incorrectly operated is not covered. Product finish is excluded from this warranty. No other warranties are expressed or implied. We reserve the right to make changes in design, materials and specifications without prior notice.
View AllClose

Videos Hide Videos Show Videos