DFSB-K435G Translucent Yellow Fluorescent Dye Test Size

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1.50 Ounces
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  • DFSB-K435G Translucent UV reactive yellow dye that glows under black light and soluble in solvents
  • Clear yellow oil soluble dye in five gram test size DFSB-K435G
  • Air conditioning  oil based dry powder black light yellow colored dye DFSB-K435G
  • Heating and air conditioning oil tracer DFSB-K435G that is translucent and fluorescent under black light
MSRP: $28.98
— You save $9.00


DFSB-K435G Risk Reactor's DFSB-K43 is a clean green-shade yellow soluble in a wide range of solvents. Used in NDT, petroleum based tracing, leak detection, printing inks, and plastics. This material is used extensively in strain and non-destructive flaw detection. It is mixed with penetrante fluids to detect cracks and flaws and strain effects. Flaws can be detected in plastic material, non-porous ceramics, ferrous and on-ferrous alloys. 

The loading for this DFSB-K43 UV Dye is 0.05% and 0.5%.

Benefits of Risk Reactor's DFSB-K43 Green Shade Yellow Solvent Tracer:

  1. Visible and fluorescent for easy detection in small quantities!
  2. Easy to work with!
  3. Fluoresces a bright greenish yellow under long wave black light!
  4. Soluble in wide range of solvents!
  5. Used in plastics, NDT (Non Destructive Testing), leak detection and printing inks!
  6. Very concentrated, saving you money!
  7. Use with our long wave battery operated black lights for portability in the field!

Used In:
This is a very concentrated visible and fluorescent dye used in just about any solvent based application. Being visible and fluorescent allows our clients to use this dye in numerous ways. The highly fluorescent characteristic gives off a strong indication of its presence. It can be formulated in inks, NDT, plastics, and/or used by itself as a tracer.

Flaw and Strain Detection
Among the many varied uses for DFSB-K43 Green Yellow  is non-destructive flaw and strain detection in materials. For metals, IFKYR-13 is mixed with penetrant fluids to detect cracks and flaws and strain effects. Flaws can also be detected in plastic material, non-porous ceramics, ferrous and non-ferrous alloys. Materials are tested for flaws by immersion in a suitable penetrant fluid, and after a period, are removed, drained and the surface wiped clean; or the fluid is applied to the surface of the material to be examined and subsequently the surface is wiped clean for examination. The penetrant fluid remains trapped in the surface cracks and flaws which may be so minute as to be beyond the range of resolution of the human eye. So to give the necessary sensitivity for detection, penetrant fluids contain "color tracers" which are in most cases one or more fluorescent compounds or dyestuffs. Fluorescent DFSB-K43 is universally accepted as the best color tracer used in the penetrant field.

After treatment with the penetrant fluid, subsequent draining and final preparation of the surface, the materials or object under test is irradiated with a source of ultra-violet (blacklight) light, and the entrapped fluorescent dyestuff and increase the luminosity, so that dimensional flaws of the magnitude of less than 100 mu become easily identifiable.

Fluorescent DFSB-K43 owes its preeminence in this field to the fact that its properties fulfill all the requirements of a fluorescent color tracer, having he requisite solubility and stability under conditions of use. The color fluorescence also varies only slightly in widely differing solvents, usually between greenish yellow and yellowish green. In general, polar and water based solvents give slightly yellower fluorescence.

There are some solvents in which fluorescent DFSB-K43 has limited solubility. This can be overcome by admixture with other solvents, for example in the case of penetrant fluids which would include such solvents as polyethylene glycols, and polyoxythylated alkyl phenols in conjunction with solvents such as mineral oil, methyl naphthalene or benzene. By mixing suitable solvents in all cases the required solubility of 1%-2% is easily achievable.

In oil based systems, the solvents used may be mineral oil or spindle oil, alkylated benzenes and naphthalenes such as toluene, xylene, methyl and dimethyl naphthalene, etc. high boiling kerosene fractions and similar solvents. The solvents must, in all cases, be of low volatility and high penetrating power.

In addition these systems will contain solvents of high surface active power such as polyoxyethylated octyl or nonyl phenols and polyethylene glycols and ethylene glycol alkyl ethers. The compositions can vary over a wide range to obtain the exact properties of the penetrant fluid required but an example of such a system is:

100 Parts Oil (kerosene or dimethyl napthalene, etc.)
25   Parts Polyethylene glycol derivative.
25   Parts Polyoxyethylated nonyl alcohol.
2-3  Parts DFSB-K43.

In water based penetrant fluid systems, the fluorescent DFSB-K43 needs to be mixed into solvents which are soluble in or miscible with water. (I.e. oxyethylated alkyl phenols, polyethylene glycols, ethylene glycol alkyl ethers and similar hydroxylic solvents.) The compositions can vary over a wide range to obtain the exact properties of the penetrant fluid required but an example of such a system is:

49  Parts Polyoxyethylated Nonyl Phenol
49  Parts Polyethylene Glycol
2    Parts DFSB-K43

Non-ionic emulsifiers are used after the application of either the oil based or water based penetrant fluids as couplers, to convert the system to be opposite phase for removal of the colorant. This is essential in the washing process.

Technical Information:

Appearance: Yellow powder.
Decomposition Temp: Approx 6-9 @ 20 G/L H2O (20 C) .
Fluorescent greenish yellow.
Chemical Type:
Fluorescent Dye.
Chemical Class: Organic dye.

TOSCA Listing:
Specific Gravity: 0.00 
Bulk Density: 00 
Melt Point: 123 C
Molecular Weight: 324.42
Particle Size: 0 nm
Hiding Power: Transparent.
Oil Absorption: 0.00
pH: 0

Solubility Data (g/100ml)

Dimethylformamide: 1.20
Ethyl Alcohol: .80
Butyl Alcohol: 1.00
Acetone: 1.00
Ethylene Glycol: 0.70
Toluene: 0.60
ABS: Yes 4 4
ACRYLIC: Yes 4 4
RIGID PVC: Yes 4 4

How to Use:
If using this item as a tracer, dilute in a small amount of the medium first. This will inform you of the solubility and also help the dye disperse better when you enter it into the main system being traced. If you have a unique application please contact one of our technicians.

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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.
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