Monobutyl phthalate
Also known as: Butyl hydrogen phthalate, Phthalic acid mono-n-butyl ester, 2-(Butoxycarbonyl)benzoic acid, 1,2-Benzenedicarboxylic acid 1-butyl ester, n-Butyl hydrogen phthalate, Mono-n-butyl phthalate, MBP
Monobutyl phthalate (CAS 131-70-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H14O4 and a molecular weight of 222.23700 g/mol. Key properties include a melting point of 73 °C, a boiling point of 363.5ºC at 760mmHg, a density of 1.173g/cm3 and a flash point of 138.2ºC. It is classified under GHS with signal word Danger and hazard statements H360 — May damage fertility or the unborn child. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 131-70-4
- Jingsj CID
- J-14594-3
- Molecular Formula
- C12H14O4
- Molecular Weight
- 222.23700 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 73 °C |
|---|---|
| Boiling Point | 363.5ºC at 760mmHg |
| Density | 1.173g/cm3 |
| Flash Point | 138.2ºC |
| Exact Mass | 222.08900 |
| PSA | 63.60000 |
| LogP | 2.34170 |
GHS Safety & Compliance
- H360 — May damage fertility or the unborn child
Activity & Biological Data
| Additional Information | [1]. van Dartel DA, et al. Early gene expression changes during embryonic stem cell differentiation into cardiomyocytes and their modulation by monobutyl phthalate. Reprod Toxicol. 2009 Apr;27(2):93-102. [2]. Ema M, et al. Antiandrogenic effects of dibutyl phthalate and its metabolite, monobutyl phthalate, in rats. Congenit Anom (Kyoto). 2002 Dec;42(4):297-308. |
|---|
Customs & Trade Information
| HS Code | 2918990090 |
|---|---|
| Summary | 2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Monobutyl phthalate?
The CAS number of Monobutyl phthalate is 131-70-4.
What are the molecular formula and molecular weight of Monobutyl phthalate?
Monobutyl phthalate has molecular formula C12H14O4 and molecular weight 222.23700 g/mol.
Is Monobutyl phthalate hazardous?
Monobutyl phthalate has GHS signal word Danger and hazard statements H360 — May damage fertility or the unborn child.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Monobutyl phthalate (CAS 131-70-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14594-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.