Methyldopa
Also known as: alpha-Methyldopa, (-)-Methyldopa, L-Methyldopa, (2S)-2-Amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoic acid, 3-(3,4-Dihydroxyphenyl)-α-methyl-L-alanine, 3-Hydroxy-α-methyl-L-tyrosine, 2-Methyl-3-(3,4-dihydroxyphenyl)alanine, Aldomet, Dopamet, Dopegyt, MK-351, Methyldopa sesquihydrate
Methyldopa (CAS 555-30-6) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C10H13NO4 and a molecular weight of 211.214 g/mol. Key properties include a melting point of ≥300 °C, a boiling point of 441.6±45.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 220.9±28.7 °C. It is listed by 1 supplier, from 65.88 to 118.98 CNY. Record last updated Nov 3, 2026.
- CAS No.
- 555-30-6
- Jingsj CID
- J-35795-9
- Molecular Formula
- C10H13NO4
- Molecular Weight
- 211.214 g/mol
- Category
- Organic Compounds
- Last updated
- 11/3/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
In Stock | ≥99% 25g | ¥1,647.00 | $9.86 /gBest ¥65.88/g CNY | CN China MOQ 25g | |
In Stock | ≥99% 5g | ¥594.90 | $17.8 /g ¥118.98/g CNY | CN China MOQ 5g |
Physicochemical Properties
| Melting Point | ≥300 °C |
|---|---|
| Boiling Point | 441.6±45.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 220.9±28.7 °C |
| Exact Mass | 211.084457 |
| PSA | 103.78000 |
| LogP | 0.13 |
| Vapor Pressure | 0.0±1.1 mmHg at 25°C |
| Refractive Index | 1.635 |
| Storage Conditions | Store at RT |
Activity & Biological Data
| Additional Information | [1]. BAILA MR, et al. The use of the combination of L-alpha-methyldopa and dichlorothiazide in the treatment of arterial hypertension. Dia Med. 1962 Dec 6;34:2422-4. |
|---|
Customs & Trade Information
| HS Code | 2918199090 |
|---|---|
| Summary | 2918199090 other carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Methyldopa?
The CAS number of Methyldopa is 555-30-6.
What are the molecular formula and molecular weight of Methyldopa?
Methyldopa has molecular formula C10H13NO4 and molecular weight 211.214 g/mol.
Which suppliers offer Methyldopa?
1 supplier(s) listed; reference unit price ¥65.88–118.98 /g.
What are the upstream and downstream products of Methyldopa?
For Methyldopa, Upstream Products: 4-(Bromomethyl)-1,2-dimethoxybenzene; Downstream Products: 1-O-Acetyl-2,3,5-tri-O-benzoyl-D-ribofuranose.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyldopa (CAS 555-30-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35795-9 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.