Sodium Benzotriazole 40%
Benzotriazole already in water and ready to meter. A 40 percent aqueous sodium salt for systems built around liquid feed.
Benzotriazole already in water and ready to meter. A 40 percent aqueous sodium salt for systems built around liquid feed.
Sodium benzotriazole 40 percent is benzotriazole that has already been through the dissolving step. It is the sodium salt of the molecule, supplied as a clear aqueous solution at 39.5 to 41.0 percent, and it is what a plant buys when it meters a liquid rather than blending a powder.
The chemistry that reaches the metal is the same. The azole bonds to a copper surface and builds a thin insoluble film that blocks chloride and sulfate from reaching the metal underneath, and it holds at dose rates measured in parts per million. What changes is everything upstream of that: no dissolving vessel, no dust, no undissolved solids in a strainer, and a product that goes straight into a water-based formulation or a chemical feed pump.
The salt is alkaline and that is not incidental. Converting the free acid to its sodium salt is what makes it fully water-soluble at this concentration, and the solution reads pH 11.0 to 12.0 as a 10 percent dilution. It has to be treated as a caustic material, kept away from acids and oxidizing agents, and handled with the personal protective equipment the safety data sheet specifies.
It is a liquid, so it can freeze. PAT's safety data sheet puts the freezing point between minus 5 and minus 10 degrees C and directs the user to protect the product from freezing and to store it at or above 0 degrees C. That is the storage fact that matters through a northern winter, and it is the one most often missed on a receiving dock.
The specification below is the one PAT releases lots against, including limits on chlorides and on free sodium hydroxide. Where a system meters powder instead, the fine granular benzotriazole is the same chemistry as a dry solid.
The CAS Registry Number is 15217-42-2. It is also written as sodium benzotriazole, BTA-Na, 1H-benzotriazole sodium salt, benzotriazole sodium salt, and sodium benzotriazolate.
| Property | Specification |
|---|---|
| Appearance | Colorless to amber liquid |
| Assay | 39.5 to 41.0 percent |
| pH, 10 percent solution | 11.0 to 12.0 |
| Chlorides | 100 ppm maximum |
| Sodium hydroxide | 0.5 percent 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.
Yellow-metal passivation in open recirculating and closed-loop systems, metered straight into the feed.
The azole component of a blended inhibitor package, added as a liquid to a liquid.
Copper and yellow-metal protection built into a water-miscible concentrate without a dissolving step.
Protects yellow metal while an alkaline cleaner works on the deposit.
Goes into water-borne systems directly, where a copper or brass component has to be protected.
Yellow-metal protection in a fluid that is already aqueous.
It is specified where the formulation needs already in solution, so no dissolving vessel, no dust and no undissolved solids, meters directly through a chemical feed pump into a liquid program, fully water-soluble at 40 percent, where the free acid is not, released against a five-point specification including chlorides and free caustic, and held in United States stock and sold by the drum.
Add it as a liquid to a liquid. The product is designed for direct metering into an aqueous system or into a water-based concentrate, and it needs no premix. Where it is being blended into a formulation, add it with the water phase rather than into a solvent or an acidic component.
The solution is alkaline. Keep it away from acids, from oxidizing agents and from metals, per PAT's safety data sheet, and expect it to raise the pH of whatever it is added to in proportion to the dose. Where a formulation has a tight pH window, allow for that in the build order.
Protect it from freezing. The freezing point is between minus 5 and minus 10 degrees C. A frozen and thawed drum should be brought back to room temperature and homogenized before use, and checked for haze or precipitate before it goes into a feed system.
Use the personal protective equipment the safety data sheet specifies, handle in a well-ventilated area, and wash thoroughly after handling. This is a caustic liquid and it is not the same handling proposition as the granular solid.
Package sizes: 500 lb (226.8 kg) drums..
Storage: Store in a cool, dry, well-ventilated area at or above 0 degrees C. Keep containers closed when not in use and isolated from incompatible materials. Protect from freezing: PAT's safety data sheet puts the freezing point between minus 5 and minus 10 degrees C.
PAT's safety data sheet records that all components of this product are listed on the TSCA inventory, that it is not listed under CERCLA, and that no components appear on the SARA Title III Section 302 or 304 hazardous chemicals lists. A regulatory information sheet issued and signed by PAT records the product as free of California Proposition 65 listed substances, free of REACH substances of very high concern, with zero volatile organic content by EPA Method 24, and with all components listed on the Canadian Domestic and Non-Domestic Substances Lists, on EINECS under EC 239-269-6, and on the Australian, Chinese, Japanese, Korean, Philippine, Taiwanese and New Zealand inventories. Refer to the current safety data sheet for hazard classification and for the label elements that apply. Tell us which jurisdictions your qualification needs confirmed and we will confirm them in writing.
It is the sodium salt. PAT's safety data sheet identifies it as 1H-benzotriazole sodium salt in a one-to-one ratio, formula C6H4N3Na, CAS 15217-42-2, at 39 to 41 percent with the balance water. That matters practically as well as chemically: the salt is what makes the material fully water-soluble at this concentration, and it is why the solution is strongly alkaline where the free acid is not. Free-acid benzotriazole is CAS 95-14-7 and is the granular solid, a different product on this catalog.
The 39.5 to 41.0 percent on the certificate of analysis is the assay PAT releases lots against. Because the salt carries a sodium atom in place of a hydrogen, the equivalent figure expressed as free benzotriazole is lower, and some specifications are written that way. PAT's documents state the release number without naming the basis, so if your specification is written on a free-benzotriazole active basis, tell us and we will confirm in writing which number applies to your lot before you specify it.
A handling decision, not a performance one. Take the liquid if you meter through a feed pump, if you are building a water-based concentrate, or if dust and a dissolving vessel are things you would rather not have on the plant. Take the granular solid if you blend dry packages, if you want to avoid freighting water, or if storage would take the product below freezing. The film that ends up on the copper is the same either way.
The freezing point is between minus 5 and minus 10 degrees C, and PAT's safety data sheet directs that the product be protected from freezing and stored at or above 0 degrees C. A drum that has frozen and thawed should be warmed to room temperature and homogenized, then checked for haze or precipitate before it goes near a feed system. If a lot looks wrong after a cold shipment, tell us before you feed it.
The specification is pH 11.0 to 12.0 measured as a 10 percent solution, so the neat product is more alkaline still and has to be treated as a caustic material. It will raise the pH of whatever it is dosed into in proportion to the dose. Keep it away from acids, oxidizing agents and metals per the safety data sheet, and where a formulation has a tight pH window, add it with the water phase and allow for the shift in the build order.
It is held in stock in the United States and ships across the United States, Canada and Mexico. Standard packaging is 500 lb drums, which is 226.8 kg, and we sell by the drum. Tell us the volume, the pack size and the lead time you need and we will confirm all three with the quote.
Yes. We send the Technical Data Sheet (TDS), Safety Data Sheet (SDS), Certificate of Analysis (COA), and Regulatory Information Sheet on request, in the current revision. Use Request TDS or SDS above and tell us what your qualification review needs.
The same chemistry as a dry 99 percent solid.
The methyl-substituted salt, for hot systems and chlorinated water.
Grades, forms and what we hold in stock.
The selection question this grade exists to answer.
Yellow-metal passivation in open recirculating and closed-loop systems.
Which azole to put in the feed, before deciding on the form.