Molekula
4,4'-Dimethoxytritylchloride (DMT-Cl)
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
4,4'-Dimethoxytrityl chloride (DMT-Cl) is a key reagent used in nucleic acid synthesis for the protection of hydroxyl groups during solid-phase oligonucleotide assembly. It is a white to pale yellow solid with a molecular formula of C21H19ClO2 and a molecular weight of 338.83 g/mol. CAS number: 40615-36-9. Store at ambient temperature. Signal word: Warning. Molekula supplies 4,4'-Dimethoxytrityl chloride 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 — £46.70 per pack ex VAT · £56.04 inc. VAT
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100 g — £91.60 per pack ex VAT · £109.92 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 | Light pink powder |
| Melting Point | 120 - 125 °C |
| Purity (HPLC) | ≥ 99% |
| Loss on Drying | ≤ 1.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 65276715 |
| CAS Number | 40615-36-9 |
| IUPAC Name | 1-[chloro-(4-methoxyphenyl)-phenylmethyl]-4-methoxybenzene |
| EC Number | 255-002-6 |
| Molecular Formula | C21H19ClO2 |
| Molecular Weight | 338.83 |
| Exact Mass | 338.1074 |
| SMILES | COC1=CC=C(C=C1)C(C2=CC=CC=C2)(C3=CC=C(C=C3)OC)Cl |
| InChIKey | JBWYRBLDOOOJEU-UHFFFAOYSA-N |
| InChI | InChI=1S/C21H19ClO2/c1-23-19-12-8-17(9-13-19)21(22,16-6-4-3-5-7-16)18-10-14-20(24-2)15-11-18/h3-15H,1-2H3 |
| PubChem CID | 96831 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| HTS Code | 2909306000 |
| Tariff Code | 2909309090 |
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
- EUH029 Contact with water liberates toxic gas
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
- H318 Causes serious eye damage
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- 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
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: 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
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
- 1-[chloro-(4-methoxyphenyl)-phenylmethyl]-4-methoxybenzene
- 1,1'-(Chlorophenylmethylene)bis(4-methoxybenzene)
- 4,4 inverted exclamation mark -Dimethoxytrityl Chloride
- 4,4'-(chloro(phenyl)methylene)bis(methoxybenzene)
- 4,4'-DIMETHOXY-TRIPHENYL CHLOROMETHANE
- 4,4'-Dimethoxytriphenylmethyl chloride
- 4,4'-Dimethoxytrityl chloride
- Benzene, 1,1'-(chlorophenylmethylene)bis[4-methoxy-
- DMT-Cl
- DMTrCl
Frequently asked questions
What is 4,4'-Dimethoxytrityl chloride (DMT-Cl) used for?
DMT-Cl is primarily used as a protecting group for the 5'-hydroxyl group in oligonucleotide synthesis.
What is the chemical formula and molecular weight of DMT-Cl?
The formula is C21H19ClO2 with a molecular weight of 338.83 g/mol.
How should DMT-Cl be stored?
DMT-Cl should be stored at ambient temperature, protected from moisture and light.
What grade of DMT-Cl does Molekula supply?
Molekula supplies DMT-Cl in high-purity grade suitable for nucleic acid synthesis.
Can Molekula supply DMT-Cl in bulk quantities?
Yes, Molekula can supply DMT-Cl in bulk quantities—please contact us for custom order details.
What documentation comes with a DMT-Cl order?
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.