Molekula
N-Chlorosuccinimide
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
N-Chlorosuccinimide is a white crystalline solid used as a selective chlorinating agent in organic synthesis, particularly for halogenation of aromatic compounds, and as a disinfectant and bleaching agent. It is also employed in water treatment and as a reagent in analytical chemistry. CAS 128-09-6, molecular formula C4H4ClNO2, molecular weight 133.53. Store at ambient conditions. Signal word: Danger. Molekula supplies N-Chlorosuccinimide 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
On backorder — expected to ship by 25 November 2026
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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100 g — £29.50 per pack ex VAT · £35.40 inc. VAT
Need a different quantity or pack?
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 to off white crystal powder |
| Identification | Conforms to reference |
| Assay | ≥98.0% |
| Active Chlorine | ≥25.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 110 °C |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Orthorhombic crystals |
| Odour | Slight chlorine odor |
| Melting Point | 150 °C |
| Density | 1.65 g/cm³ at 25 °C |
| Water Solubility | 14 g/L at 25 °C |
| Solubility (other solvents) | 1 g dissolves in about 150 mL alcohol, about 50 mL benzene; sparingly soluble in ether, chloroform, carbon tetrachloride |
| Vapour Pressure | 0.00768 mmHg |
Source: PubChem CID 31398 (HSDB, Haz-Map)
Identification
| Property | Value |
|---|---|
| SKU | 35585453 |
| CAS Number | 128-09-6 |
| IUPAC Name | 1-chloropyrrolidine-2,5-dione |
| EC Number | 204-878-8 |
| Molecular Formula | C4H4ClNO2 |
| Molecular Weight | 133.53 |
| Exact Mass | 132.9931 |
| SMILES | C1CC(=O)N(C1=O)Cl |
| InChIKey | JRNVZBWKYDBUCA-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H4ClNO2/c5-6-3(7)1-2-4(6)8/h1-2H2 |
| PubChem CID | 31398 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29213050 |
| Tariff Code | 2929909090 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P406 Store in a corrosive resistant container with a resistant inner liner
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, 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
- 1-Chloro-2,5-pyrrolidinedione
- 1-chloropyrrolidine-2,5-dione
- 2,5-Pyrrolidinedione, 1-chloro-
- Chlorosuccinimide
- NCS
- Succinchlorimide
- Succinic acid, imide, N-chloro-
- Succinic N-chloroimide
- Succinimide, N-chloro-
- Succinochlorimide
Frequently asked questions
What is N-Chlorosuccinimide (NCS) commonly used for?
N-Chlorosuccinimide is primarily used as a chlorinating agent in organic synthesis, including the preparation of chlorohydrins, epoxidation reactions, and as a mild oxidant or reagent in pharmaceutical and agrochemical manufacturing.
What is the molecular formula and molecular weight of N-Chlorosuccinimide?
The molecular formula is **C₄H₄ClNO₂**, and the molecular weight is **133.53 g/mol**.
What safety classification does N-Chlorosuccinimide fall under?
N-Chlorosuccinimide is classified with the **signal word 'Danger'** due to its hazardous properties, including skin corrosion and serious eye damage.
How should N-Chlorosuccinimide be stored?
Store N-Chlorosuccinimide at **ambient temperature** in a cool, dry place, away from incompatible substances like strong oxidizers, reducing agents, or metals.
Does Molekula supply N-Chlorosuccinimide in bulk quantities?
Yes, Molekula can supply N-Chlorosuccinimide in **bulk quantities** upon request, depending on availability and customer requirements.
What documentation is provided with an order of N-Chlorosuccinimide?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **batch-specific documentation** to ensure compliance and traceability.
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