Molekula
Dimethyl yellow (C.I. 11020)
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
Dimethyl yellow (C.I. 11020) is a synthetic organic dye used in analytical chemistry and as a pH indicator. It is a yellow crystalline solid with the molecular formula C6H5N=NC6H4N(CH3)2 and a molecular weight of 225.29 g/mol. It is stable at ambient temperatures and should be handled with care due to its danger signal word. CAS number: 60-11-7. Molekula supplies Dimethyl yellow (C.I. 11020) 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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25 g — £30.90 per pack ex VAT · £37.08 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 | Yellow to Orange to brown powder |
| Melting Point | 105 - 116 ℃ |
| Loss on Drying | ≤1.0% |
| Sulphated Ash | 0.4% |
| Strength | 98.67% |
| Lambda max | 400nm (in methanol) |
| Colour Change | Red @ pH 2.9, Yellow @ pH 4.9 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 27793472 |
| CAS Number | 60-11-7 |
| Molecular Formula | C6H5N=NC6H4N(CH3)2 |
| Molecular Weight | 225.29 |
| SMILES | N(=NC1=CC=C(C=C1)N(C)C)C=2C=CC=CC2 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29270030 |
| Tariff Code | 2927000090 |
Safety & GHS
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Toxic
GHS06
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Serious Health Hazard
GHS08
Hazard statements
- H301 Toxic if swallowed
- H351 Suspected of causing cancer
Precautionary statements
- P201 Obtain special instructions before use
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, 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 Dimethyl yellow (C.I. 11020) used for?
Dimethyl yellow is primarily used as a pH indicator in analytical chemistry, particularly in titrations where it changes color from red to yellow over a transition range of about pH 2.9 to 4.0.
What is the chemical formula and molecular weight of Dimethyl yellow?
The formula is C6H5N=NC6H4N(CH3)2 with a molecular weight of 225.29 g/mol.
How should Dimethyl yellow be stored?
It should be stored at ambient temperature, away from light and moisture, and kept in a tightly closed container.
What grade of Dimethyl yellow does Molekula supply?
Molekula supplies Dimethyl yellow in analytical grade, suitable for laboratory use.
Can Molekula supply Dimethyl yellow in bulk quantities?
Yes, Molekula can supply Dimethyl yellow in bulk quantities—please contact our sales team for volume pricing and availability.
What documentation comes with a purchase of Dimethyl yellow?
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.