Molekula
4,5-Dichloro-2-octyl-isothiazolone
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
4,5-Dichloro-2-octyl-isothiazolone is a broad-spectrum biocide used in industrial and consumer applications to prevent microbial growth in water-based systems. It is effective against bacteria, fungi, and algae. CAS: 64359-81-5, Molecular Formula: C11H17Cl2NOS, Molecular Weight: 282.22 g/mol, Storage: Ambient, Signal Word: Danger. Molekula supplies 4,5-Dichloro-2-octyl-isothiazolone from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White/ off white crystalline powder |
| Purity | ≥ 97.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 (8) |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 40-46 °C |
| Density | 1.28 g/cm³ at 25 °C (melted and so |
| Vapour Pressure | 7.4 × 10⁻⁶ mmHg at 25 °C |
| log P (octanol/water) | 2.8 |
Source: PubChem CID 91688 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90026830 |
| CAS Number | 64359-81-5 |
| IUPAC Name | 4,5-dichloro-2-octyl-1,2-thiazol-3-one |
| EC Number | 264-843-8 |
| Molecular Formula | C11H17Cl2NOS |
| Molecular Weight | 282.22 |
| Exact Mass | 281.0408 |
| SMILES | CCCCCCCCN1C(=O)C(=C(S1)Cl)Cl |
| InChIKey | PORQOHRXAJJKGK-UHFFFAOYSA-N |
| InChI | InChI=1S/C11H17Cl2NOS/c1-2-3-4-5-6-7-8-14-11(15)9(12)10(13)16-14/h2-8H2,1H3 |
| PubChem CID | 91688 |
| UN Number | UN2928 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2934102000 |
| Tariff Code | 2934100090 |
Safety & GHS
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Corrosive
GHS05
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- EUH071 Corrosive to the respiratory tract
- H302 Harmful if swallowed
- H314 Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
- H330 Fatal if inhaled
- H341 Suspected of causing genetic defects
- H360 May damage fertility or the unborn child
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+341 IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 3(2H)-Isothiazolone, 4,5-dichloro-2-octyl-
- 4,5-Dichloro-2-n-octyl-3(2H)-isothiazolone
- 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one
- 4,5-dichloro-2-octyl-3-isothiazolone
- 4,5-Dichloro-2-octylisothiazol-3(2H)-one
- Anti-Foulant C-9211M
- dcoit
- Kathon 930
- SEA-NINE
- Sea-Nine 211
Frequently asked questions
What is 4,5-Dichloro-2-octyl-isothiazolone used for?
It is primarily used as a biocide in industrial water systems, coatings, marine antifouling paints, wood preservation and plastics to prevent microbial growth.
What is the chemical formula and molecular weight?
The formula is C11H17Cl2NOS with a molecular weight of 282.22 g/mol.
How should this compound be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade is available?
Available in technical grade; custom purity options may be available upon request.
Can Molekula supply this in bulk?
Yes, Molekula can supply 4,5-Dichloro-2-octyl-isothiazolone in bulk quantities; please contact sales for details.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) compliant with GHS standards.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.