Molekula
Toluidine Blue O
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
This product is listed as Toluidine Blue O, but its record currently combines details from two different compounds. The CAS number 95-53-4, molecular formula CH3C6H4NH2 (C7H9N) and molecular weight of 107.15 g/mol belong to o-toluidine, an aromatic amine, not to the thiazine dye Toluidine Blue O (CAS 92-31-9). o-Toluidine itself is mainly used as an intermediate in making dyes, the herbicides metolachlor and acetochlor, and rubber vulcanization accelerators. Please confirm the exact compound with our team before ordering. Store at ambient temperature. Signal word: Danger. Molekula supplies Toluidine Blue O 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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5 g — £33.00 per pack ex VAT · £39.60 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 | Clear colourless to to yellow or pale brown liquid |
| Refractive Index | 1.5710 - 1.5740 (at 20°C) |
| Assay | ⩾ 98.0% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 85 °C |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless to pale-yellow liquid |
| Odour | Aromatic aniline-like odor |
| Melting Point | -16 °C (beta-form) |
| Boiling Point | 200.3 °C |
| Density | 1 (relative, water = 1) |
| Water Solubility | 16.6 g/L at 25 °C |
| Solubility (other solvents) | Soluble in alcohol and ether |
| Vapour Pressure | 34.5 Pa at 25 °C |
| Refractive Index | 1.5688 |
| pKa | pKa = 4.44 |
| log P (octanol/water) | 1.32 |
Source: PubChem CID 7242 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90028901 |
| CAS Number | 95-53-4 |
| IUPAC Name | 2-methylaniline |
| EC Number | 202-429-0 |
| Molecular Formula | CH3C6H4NH2 |
| Molecular Weight | 107.15 |
| Exact Mass | 107.0735 |
| SMILES | CC1=CC=CC=C1N |
| InChIKey | RNVCVTLRINQCPJ-UHFFFAOYSA-N |
| InChI | InChI=1S/C7H9N/c1-6-4-2-3-5-7(6)8/h2-5H,8H2,1H3 |
| PubChem CID | 7242 |
| UN Number | UN1708 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2921.42.9000 |
| Tariff Code | 2921430080 |
Safety & GHS
-
Corrosive
GHS05
-
Toxic
GHS06
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H227 Combustible liquid
- H301 + H331 Toxic if swallowed or inhaled
- H312 Harmful in contact with skin
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H341 Suspected of causing genetic defects
- H350 May cause cancer
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- 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, English (US), 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
No alternate names recorded for this product.
Frequently asked questions
What is Toluidine Blue O used for?
The identifiers on this record (CAS 95-53-4) belong to o-toluidine rather than the dye Toluidine Blue O, so the applications depend on which compound you need. Please contact our team to confirm the product identity before ordering.
What is the chemical formula and molecular weight of Toluidine Blue O?
The formula listed for this product is CH3C6H4NH2 (C7H9N) and the molecular weight is 107.15 g/mol. These values, together with CAS 95-53-4, correspond to o-toluidine. The dye Toluidine Blue O is a different compound (CAS 92-31-9).
How should Toluidine Blue O be stored?
Store at ambient temperature, away from light and moisture, and keep in a tightly closed container.
What grade of Toluidine Blue O is available?
Available in analytical grade for laboratory use.
Can Molekula supply Toluidine Blue O in bulk?
Yes, Molekula can supply Toluidine Blue O in bulk quantities; please contact our sales team for pricing and availability.
What documentation comes with a purchase of Toluidine Blue O?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.