Tolyltriazole Granular 99%
The methyl-substituted grade, chosen where a system runs hot or carries an oxidizing biocide. A 99 percent granular solid on a seven-point specification.
The methyl-substituted grade, chosen where a system runs hot or carries an oxidizing biocide. A 99 percent granular solid on a seven-point specification.
Tolyltriazole is benzotriazole carrying a methyl group on the ring, and PAT supplies it as a 99 percent granular solid, white to slightly yellow, released against a seven-point specification. The methyl group is the whole difference, and it shows up in service, not in purity.
It changes the answer in two conditions. Where a system runs hot, tolyltriazole stays effective at higher operating temperatures than the unsubstituted molecule. Where a system carries an oxidizing biocide, it holds up better against chlorine and other halogen disinfectants instead of being consumed by them. That is why it is the grade specified in chlorinated cooling water, in engine coolant and antifreeze that has to last for years, and in long-life high-temperature fluids.
What it does is the same job benzotriazole does. The molecule bonds to a copper surface and builds a thin insoluble film that blocks chloride and sulfate from reaching the metal underneath, at dose rates measured in parts per million. PAT's technical data sheet names copper and its alloys as the target and extends the list to zinc, cobalt and silver, and notes that in a multi-metal system alongside other corrosion inhibitors tolyltriazole will also protect aluminum and steel.
The melt point is the row that separates the two solids on sight. Tolyltriazole is released at 84 to 87 degrees C against 98 to 99 for benzotriazole, so a low melt point on a certificate of analysis is not a defect, it is the wrong sheet. The rest of the specification is identical between the two grades: assay 99.8 percent minimum, water 0.08 percent maximum, ash 0.02 percent maximum, pH 5.0 to 6.0 and chlorides at 20 ppm maximum.
Stock is held in the United States and shipped from a domestic warehouse, by the drum. Where a system meters a liquid instead of a powder, the sodium salt at 50 percent is the same chemistry already in water.
The CAS Registry Number is 29385-43-1. It is also written as tolyltriazole, TTA, methyl-1H-benzotriazole, methylbenzotriazole, and tolyltriazole granular.
| Property | Specification |
|---|---|
| Appearance | White or slightly yellow granular powder |
| Assay content | 99.8 percent minimum |
| Water | 0.08 percent maximum |
| Melt point | 84 to 87 degrees C |
| Ash | 0.02 percent maximum |
| pH | 5.0 to 6.0 |
| Chlorides | 20 ppm maximum |
These are specification limits from the technical data sheet, not typical values. Every batch is released against them and the certificate of analysis reports the measured result. We will send the current TDS and the batch documentation your qualification needs.
Tell us the binder system, the property you are targeting, and the volume you expect. We will confirm the grade, send the documentation, and ship a sample from North American stock.
The reason the grade exists. Holds up against chlorine and other halogen biocides where the unsubstituted molecule is consumed faster.
Guards copper, brass and solder in formulations that run hot and are expected to last for years.
Yellow-metal passivation in systems where temperature or oxidant load rules out the base inhibitor.
Copper and yellow-metal protection in soluble-oil, semi-synthetic and synthetic fluids.
Long-life fluid packages where copper attack would degrade the fluid as well as the equipment.
Surface treatment and anti-tarnish on copper and brass finishing lines.
Protects yellow metal while an acidic or alkaline cleaner does its work on the deposit.
It is specified where the formulation needs holds up against chlorine and other oxidizing biocides better than the unsubstituted molecule, stays effective at higher operating temperatures, which is what long-life coolant needs, passivates copper, brass and bronze at parts-per-million dose rates, also protects zinc, cobalt and silver, and aluminum and steel in a multi-metal package, released against a seven-point specification including chlorides at 20 ppm maximum, and held in United States stock and sold by the drum.
Tolyltriazole is a solid and most systems meet it as a solution. It is normally dissolved into water, into a glycol, or into the solvent portion of a package, then metered as a concentrate. Where the end system already runs a liquid feed, the sodium salt at 50 percent removes the dissolving step.
Dose rates are low, and the water chemistry sets them. Passivation is a surface effect a few molecules thick, so the film forms and holds at parts per million of the circulating volume. Overdosing does not build a thicker layer. It carries inventory.
Handle the dust. PAT's safety data sheet directs the user to keep the container tightly closed in a dry, well-ventilated place, and the ordinary precautions for a fine solid apply: avoid raising dust, provide ventilation where dust is generated, and avoid contact with skin and eyes.
Read the current safety data sheet before handling. Classification in this chemistry is under active review in more than one jurisdiction, so ask us for the current sheet instead of working from one that shipped with an older lot.
Package sizes: 25 kg (55.115 lb) fiber drums..
Storage: Keep the container tightly closed in a dry, well-ventilated place.
PAT's safety data sheet records that this product does not contain any chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. It contains no chemical components above the de minimis reporting thresholds established by SARA Title III Section 313, and no components subject to SARA Title III Section 302 reporting. Tolyltriazole appears on the Massachusetts, Pennsylvania and New Jersey right-to-know substance lists. PAT holds an allergen statement for the line. Refer to the current safety data sheet for hazard classification. Tell us which inventory listings or jurisdictions your qualification needs confirmed and we will confirm them in writing.
When the system runs hot, or when it carries an oxidizing biocide. Tolyltriazole holds up better against chlorine and other halogen disinfectants and stays effective at higher operating temperatures, which is why it is the standard choice in chlorinated cooling water, in engine coolant and antifreeze, and in long-life high-temperature fluids. Where neither condition applies, benzotriazole does the same job and is the base inhibitor. Both are released at 99.8 percent minimum here.
PAT's own technical data sheet and specification sheets name the product tolyltriazole, CAS 29385-43-1, and the safety data sheet gives the synonym methyl-1H-benzotriazole. We publish what our controlled documents state, not what is generally assumed about the chemistry. If your specification is written to a particular isomer or isomer ratio, tell us and we will confirm in writing what applies to the material you would be buying.
Yes, and it is the row that tells the two grades apart on sight. Tolyltriazole is released at 84 to 87 degrees C and benzotriazole at 98 to 99. Every other row on the two specifications is the same: assay 99.8 percent minimum, water 0.08 percent maximum, ash 0.02 percent maximum, pH 5.0 to 6.0 and chlorides 20 ppm maximum. A certificate of analysis in the mid eighties is a conforming lot, not a suspect one.
Yellow-metal passivation works at parts per million in the circulating water, not at percent loadings. The right number depends on the metallurgy, the temperature, the biocide program and what else is in the package, so it comes off the water chemistry and not the data sheet. Tell us the system and we will give you a starting range.
A handling decision. The granular solid ships and stores compactly, suits a formulator who dissolves a concentrate or blends a dry package, and costs nothing to freight in water. The sodium tolyltriazole liquid at 50 percent is already in water, already alkaline, and meters straight into a liquid feed with no dissolving step. If your plant runs liquid feed, take the liquid.
It is held in stock in the United States and ships across the United States, Canada and Mexico. Standard packaging is 25 kg fiber drums, which is 55.115 lb, and we sell by the drum. Tell us the volume and the lead time and we will confirm both with the quote.
Yes. We send the Technical Data Sheet (TDS), Safety Data Sheet (SDS), Certificate of Analysis (COA), and Allergen and GMO Statement on request, in the current revision. Use Request TDS or SDS above and tell us what your qualification review needs.
The base inhibitor, where temperature and biocide load do not rule it out.
The same chemistry as a ready-to-meter aqueous liquid.
Grades, forms and what we hold in stock.
The selection question this grade exists to answer.
Yellow-metal passivation where the biocide program rules the choice.
Copper protection in the sump and on the part.
The copper-azole film, and why it holds at parts per million.