![Molecular structure of 5-Methylbenzo[d][1,3]dioxole (CAS 7145-99-5)](/images/chem_structures_svg/254/7145-99-5.svg)
5-Methylbenzo[d][1,3]dioxole
Also known as: 3,4-Methylenedioxytoluene, 1,3-Benzodioxole, 5-methyl-, 1-methyl-3,4-methylenedioxybenzene, 4-methyl-methylenedioxybenzene, 5-METHYL-1,3-BENZODIOXOLE, 5-methyl-1,3-benzodioxole, Toluene, 3,4-methylenedioxy-, EINECS 230-453-1, MFCD00005833
5-Methylbenzo[d][1,3]dioxole (CAS 7145-99-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H8O2 and a molecular weight of 136.148 g/mol. Key properties include a boiling point of 200.4±30.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 76.1±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 7145-99-5
- Jingsj CID
- J-28046-6
- Molecular Formula
- C8H8O2
- Molecular Weight
- 136.148 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 200.4±30.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 76.1±0.0 °C |
| Exact Mass | 136.052429 |
| PSA | 18.46000 |
| LogP | 2.54 |
| Vapor Pressure | 0.5±0.4 mmHg at 25°C |
| Refractive Index | 1.550 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H318 — Causes serious eye damage
Frequently Asked Questions
What is the CAS number of 5-Methylbenzo[d][1,3]dioxole?
The CAS number of 5-Methylbenzo[d][1,3]dioxole is 7145-99-5.
What are the molecular formula and molecular weight of 5-Methylbenzo[d][1,3]dioxole?
5-Methylbenzo[d][1,3]dioxole has molecular formula C8H8O2 and molecular weight 136.148 g/mol.
Is 5-Methylbenzo[d][1,3]dioxole hazardous?
5-Methylbenzo[d][1,3]dioxole has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H318 — Causes serious eye damage.
What are the upstream and downstream products of 5-Methylbenzo[d][1,3]dioxole?
For 5-Methylbenzo[d][1,3]dioxole, Upstream Products: Dichloromethane, 4-methylcatechol, Piperonyl alcohol; Downstream Products: 3,4-Dimethoxytoluene, 4-methylcatechol, p-Cresol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methylbenzo[d][1,3]dioxole (CAS 7145-99-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28046-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.