Overview
Rabeprazole (CAS 117976-89-3 ), also referenced in development literature as E-3810 and LY307640, is a proton pump inhibitor (PPI) active pharmaceutical ingredient used in the treatment of acid-related gastrointestinal disorders.
It functions by irreversibly suppressing gastric acid secretion, making it a target API for finished dosage form manufacturers and generic drug developers worldwide. Rabeprazole is the active ingredient in delayed-release oral solid dosage forms.
These are primarily enteric-coated tablets and capsules formulated to treat conditions such as gastroesophageal reflux disease, peptic ulcers, and Zollinger-Ellison syndrome. Generic pharmaceutical manufacturers source the API to produce bioequivalent formulations.
These formulations are intended for regulated markets in the US, EU, and Asia-Pacific. Contract development and manufacturing organizations (CDMOs) also procure it for combination therapies, including H. pylori eradication regimens paired with antibiotics.
Formulators working on pediatric or modified-release formats may source it as an intermediate for specialized dosage development. Rabeprazole is supplied as a white to off-white crystalline powder.
The sodium salt form (Rabeprazole Sodium) is the predominant commercial grade. Material is available to USP , BP , and Ph. Eur. pharmacopoeial standards, supporting regulatory submissions across major markets.
Packaging is typically offered under inert atmosphere or moisture-controlled conditions to maintain API integrity during storage and transit. This ensures the chemical stability required for long-term pharmaceutical manufacturing.
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Physical Properties
| Melting Point | 99-100 °C (decomp) |
| Boiling Point | 603.9±65.0 °C(Predicted) |
| Density | 1.33±0.1 g/cm3(Predicted) |
| Color | Light Brown to Very Dark Brown |
| Form | Solid |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Other Names
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Chemical Properties
- CAS Number
- 117976-89-3
- EC Number
- 601-501-2
- Mol. Weight
- 359.4
- Category
- Heterocyclic Compounds