H-Asp-OtBu
Also known as: L-Aspartic acid 1-tert-butyl ester, L-Aspartic acid α-tert-butyl ester, (3S)-3-Amino-4-[(2-methyl-2-propanyl)oxy]-4-oxobutanoic acid, (3S)-3-Amino-4-tert-butoxy-4-oxobutanoic acid, tert-butyl L-aspartate, MFCD00171675
H-Asp-OtBu (CAS 4125-93-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H15NO4 and a molecular weight of 189.209 g/mol. Key properties include a boiling point of 297.8±30.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 133.9±24.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4125-93-3
- Jingsj CID
- J-1973433-9
- Molecular Formula
- C8H15NO4
- Molecular Weight
- 189.209 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 297.8±30.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 133.9±24.6 °C |
| Exact Mass | 189.100113 |
| PSA | 89.62000 |
| LogP | 0.67 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.476 |
| Storage Conditions | Store at 0°C |
Activity & Biological Data
| Additional Information | [1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-1144. |
|---|
Customs & Trade Information
| HS Code | 2922509090 |
|---|---|
| Summary | 2922509090. other amino-alcohol-phenols, amino-acid-phenols and other amino-compounds with oxygen function. 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 H-Asp-OtBu?
The CAS number of H-Asp-OtBu is 4125-93-3.
What are the molecular formula and molecular weight of H-Asp-OtBu?
H-Asp-OtBu has molecular formula C8H15NO4 and molecular weight 189.209 g/mol.
What are the upstream and downstream products of H-Asp-OtBu?
For H-Asp-OtBu, Upstream Products: Fmoc-Asp-OtBu, H-Asp(Obzl)-OtBu.HCl.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "H-Asp-OtBu (CAS 4125-93-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1973433-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.