Overview
Irgarol (CAS 28159-98-0 ), also marketed as Irgarol 1051 and known by the common name Cybutryne, is a triazine-based biocide used to inhibit algae and microbial growth in protective coating systems.
It functions as an antifouling agent, preventing biological colonization on submerged and exposed surfaces. In marine and industrial antifouling paints, Irgarol 1051 is incorporated as a co-biocide.
It is used alongside copper compounds to broaden the spectrum of protection against algae and slime-forming organisms. Coating formulators use it in hull paints, dock coatings, and offshore structure treatments.
These applications are essential where long-term biostatic performance is required. In architectural and industrial coatings, it protects exterior surfaces from algal discoloration, extending the service life.
Sealants and elastomers for outdoor construction applications also incorporate Irgarol to prevent surface biofilm development. This is particularly effective in high-humidity environments for industrial use.
Irgarol is supplied as a white to off-white crystalline powder. It is available in technical grade, with purity specifications typically at 97% or higher, suitable for direct use in coating formulations.
Packaging ranges from kilogram-scale quantities to bulk industrial supply depending on application volume requirements. This ensures flexibility for both small-scale testing and large-scale manufacturing.
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Physical Properties
| Melting Point | 128-1330 °C |
| Boiling Point | 428.0±28.0 °C(Predicted) |
| Density | 1.20±0.1 g/cm3(Predicted) |
| Appearance | White Solid |
| Color | White to Almost white |
| Form | neat |
| Water Solubility | Insoluble in water |
Safety & Handling
Warning GHS07 GHS09 Hazard Statements H317 May cause an allergic skin reaction H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P321 Specific treatment (see … on this label). P391 Collect spillage. P501 Dispose of contents/container in accordance with local regulations. P302+P352 IF ON SKIN: Wash with plenty of water. P333+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse.
Trade & Regulatory
| HS Code | 29336990 |
| UN Number | 3077 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 28159-98-0
- EC Number
- 248-872-3
- Mol. Weight
- 253.37
- HS Code
- 29336990
- Category
- Heterocyclic Compounds