1-Iodo-3,4-dimethylbenzene
1-Iodo-3,4-dimethylbenzene (CAS 31599-61-8) is an aromatic organic compound with the molecular formula (CH3)2C6H3I and a molecular weight of 232.06 g/mol. This halogenated hydrocarbon serves as a valuable building block in organic synthesis. Its structure, featuring an iodine atom attached to a dimethyl-substituted benzene ring, makes it useful for introducing the 3,4-dimethylphenyl moiety in the creation of more complex molecules, particularly within chemical research and development.
- IUPAC
- 4-Iodo-o-xylene
- Synonyms
- 4-Iodo-o-xylene

Organic Synthesis Intermediate
This compound acts as a key intermediate in various organic synthesis pathways. It is used to introduce the 3,4-dimethylphenyl group into target molecules through reactions like cross-coupling.
Research and Development
Utilised in academic and industrial research laboratories for the development of new chemical entities, pharmaceuticals, and advanced materials. Its specific structure is beneficial for targeted synthetic strategies.
Building Block for Complex Molecules
Serves as a versatile building block in the construction of larger, more intricate organic structures. The reactive iodine atom facilitates a range of substitution and coupling reactions.
| Molecular weight | 232.06 |
|---|---|
| Linear formula | (CH3)2C6H3I |
| Assay | 99% |
| Boiling point | 106-108 °C/13 mmHg(lit.) |
| Density | 1.633 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.603(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1-Iodo-3,4-dimethylbenzene used for?
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1-Iodo-3,4-dimethylbenzene is primarily used as an intermediate and building block in organic synthesis for the creation of more complex chemical structures in research and development settings.
What is the CAS number and formula for 1-Iodo-3,4-dimethylbenzene?
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The CAS number for 1-Iodo-3,4-dimethylbenzene is 31599-61-8, and its linear formula is (CH3)2C6H3I.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-Iodo-3,4-dimethylbenzene with an assay of 99%. This product is not represented as USP, BP, or EP grade.
What are the safety considerations when handling 1-Iodo-3,4-dimethylbenzene?
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1-Iodo-3,4-dimethylbenzene is a Warning substance (GHS07) and can cause skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including eyeshields and gloves, should be used, and handling should occur in a well-ventilated area or fume hood.
How is 1-Iodo-3,4-dimethylbenzene packed and shipped?
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1-Iodo-3,4-dimethylbenzene is carefully packed for domestic and international shipment in compliance with all relevant regulations to ensure safe delivery.
How can I request a quote or sample?
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To request a quote or a sample of 1-Iodo-3,4-dimethylbenzene, please contact our sales team through the website or by phone.
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