Molekula
Pigment Red 181 (VAT Red 1)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Pigment Red 181 (VAT Red 1) is a high-performance organic pigment used in coatings, plastics, and inks for its strong color strength and excellent lightfastness. It is a chlorinated thioindigo, an indigoid vat dye and pigment, with the CAS number 2379-74-0, molecular formula C18H10Cl2O2S2, and molecular weight 393.31 g/mol. It is stable under ambient storage conditions and carries a warning signal word due to potential health hazards. Molekula supplies Pigment Red 181 (VAT Red 1) 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
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 — £56.20 per pack ex VAT · £67.44 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 | Red powder |
| Strength | >90% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 89985082 |
| CAS Number | 2379-74-0 |
| IUPAC Name | (2E)-6-chloro-2-(6-chloro-4-methyl-3-oxo-1-benzothiophen-2-ylidene)-4-methyl-1-benzothiophen-3-one |
| EC Number | 219-163-6 |
| Molecular Formula | C18H10Cl2O2S2 |
| Molecular Weight | 393.31 |
| Exact Mass | 391.9499 |
| SMILES | CC1=CC(=CC2=C1C(=O)/C(=C\3/C(=O)C4=C(S3)C=C(C=C4C)Cl)/S2)Cl |
| InChIKey | NDDLLTAIKYHPOD-ISLYRVAYSA-N |
| InChI | InChI=1S/C18H10Cl2O2S2/c1-7-3-9(19)5-11-13(7)15(21)17(23-11)18-16(22)14-8(2)4-10(20)6-12(14)24-18/h3-6H,1-2H3/b18-17+ |
| PubChem CID | 3000709 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32041525 |
| Tariff Code | 3204150090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
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.
Synonyms
- 5,5'-Dichloro-3,3'-dimethyl-thioindigo
- 6,6'-Dichloro-4,4'-dimethyl-3H,3'H-2,2'-bi-1-benzothiophene-3,3'-dione
- CI 73360
- D&C Red No. 30
- D&C RED NO. 30 (II)
- Dye dc Red No. 30
- Dye Red No. 30
- Oralith Brilliant Pink R
- RED 30
- Vat red 1
Frequently asked questions
What is Pigment Red 181 used for?
Pigment Red 181 is used in high-performance applications such as automotive coatings, plastics, and inks due to its excellent color strength and durability.
What is the chemical formula and molecular weight of Pigment Red 181?
The formula is C18H10Cl2O2S2 with a molecular weight of 393.31 g/mol.
How should Pigment Red 181 be stored?
It should be stored at ambient temperature in a dry, well-ventilated area away from incompatible materials.
What grade of Pigment Red 181 is available?
Molekula supplies Pigment Red 181 in technical grade, suitable for industrial applications.
Can Molekula supply Pigment Red 181 in bulk?
Yes, Molekula can supply Pigment Red 181 in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a Pigment Red 181 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.