L-Dihydroorotic acid
Also known as: (S)-dihydroorotic acid, (4S)-2,6-dioxohexahydropyrimidine-4-carboxylic acid, Dihydroorotic acid, L-Hydroorotic acid, DIHYDRO-L-OROTIC ACID
L-Dihydroorotic acid (CAS 5988-19-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H6N2O4 and a molecular weight of 158.112 g/mol. Key properties include a melting point of 254-255 °C (dec.)(lit.), a boiling point of 524.0±60.0 °C at 760 mmHg, a density of 1.9±0.1 g/cm3 and a flash point of 270.7±32.9 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5988-19-2
- Jingsj CID
- J-33866-9
- Molecular Formula
- C5H6N2O4
- Molecular Weight
- 158.112 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 254-255 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 524.0±60.0 °C at 760 mmHg |
| Density | 1.9±0.1 g/cm3 |
| Flash Point | 270.7±32.9 °C |
| Exact Mass | 158.032761 |
| PSA | 95.50000 |
| LogP | -2.29 |
| Vapor Pressure | 0.0±3.1 mmHg at 25°C |
| Refractive Index | 1.714 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. St. Louis, Missouri,et al. ENZYMATIC SYNTHESIS AND BREAKDOWN OF A PYRIMIDINE, OROTIC ACID.October 28, 1953. |
Customs & Trade Information
| HS Code | 2934999001 |
|---|
Frequently Asked Questions
What is the CAS number of L-Dihydroorotic acid?
The CAS number of L-Dihydroorotic acid is 5988-19-2.
What are the molecular formula and molecular weight of L-Dihydroorotic acid?
L-Dihydroorotic acid has molecular formula C5H6N2O4 and molecular weight 158.112 g/mol.
Is L-Dihydroorotic acid hazardous?
L-Dihydroorotic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of L-Dihydroorotic acid?
For L-Dihydroorotic acid, Upstream Products: Orotic acid; Downstream Products: Orotic acid, (4S)-1-Methyl-2,6-dioxohexahydropyrimidine-4-carboxylic acid, (S)-Benzyl 2,6-dioxohexahydropyrimidine-4-carboxylate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "L-Dihydroorotic acid (CAS 5988-19-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33866-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.