Methyl 2-Amino-5-bromobenzoate CAS 33581-98-5 98% Off-White to Light Yellow Crystalline Powder Pharmaceutical Intermediate Benzamide Precursor

1. Product Overview

Methyl 2-amino-5-bromobenzoate (CAS: 33581-98-5), also known as methyl 5-bromoanthranilate, is an ortho-amino benzoate bearing a bromine substituent at the 5-position of the aromatic ring. It is supplied as an off-white to light yellow crystalline powder and serves as a key intermediate in the synthesis of quinazolinone, benzimidazole, and other N-heterocyclic pharmacophores via cyclization of the amino and ester/cyano functionalities. Each lot is accompanied by a CoA including HPLC assay and ¹H NMR verification.

2. Key Features and Advantages

• High Purity: ≥98.0% (HPLC), suitable for multi-step pharmaceutical synthesis

• Fully Characterized: Confirmed by ¹H NMR, ¹³C NMR, and LC-MS; CoA provided per batch

• Versatile Reactivity: Ortho-amino group for diazotization/cyclization; ester for hydrolysis to acid or reduction to alcohol; aryl-Br for cross-coupling (Suzuki, Buchwald–Hartwig)

• Low Residual Impurities: Controlled residual solvents and moisture per ICH Q3 guidelines

• Flexible Packaging: Available in 100 mg / 250 mg / 500 mg / 1 g / 5 g / 10 g / 25 g; bulk on request

• Batch Traceability: Individually lot-numbered with retained sample for re-test

3. Main Applications

• Pharmaceutical Intermediate: Building block for quinazoline/quinazolinone-based kinase inhibitors and bioactive heterocycles

• Heterocyclic Synthesis: Used in Sandmeyer reactions, cyclocondensation to benzimidazoles, and Gould–Jacobs type transformations

• Fine Chemical R&D: Intermediate for dyes, fluorescent probes, and specialty aromatic compounds

• Process Chemistry: Scalable intermediate for API pilot campaigns

4. Technical Specifications

5. Storage and Handling

• Recommended Storage: Store sealed in a cool, dry place (15–25 °C), protected from light. For long-term storage (>12 months), keep in a desiccator.

• Stability: Stable under dry, ambient conditions. Protect from moisture — the ester may slowly hydrolyze in the presence of water under acidic/basic conditions.

• Handling Precautions: Use in a well-ventilated area. Wear nitrile gloves, safety goggles, and a lab coat. Avoid dust generation.

• Shelf Life: 24 months from date of manufacture when stored as recommended.

6. Safety Overview

• GHS Classification: GHS07 – Warning

• H-Statements: H302 – Harmful if swallowed; H315 – Causes skin irritation; H319 – Causes serious eye irritation; H335 – May cause respiratory irritation

• P-Statements: P261 – Avoid breathing dust; P264 – Wash hands after handling; P270 – Do not eat/drink/smoke when using; P280 – Wear protective gloves/eye protection; P305+P351+P338 – IF IN EYES: rinse cautiously with water; P501 – Dispose of contents/container per local regulations

• First Aid:

• Skin: Wash with plenty of soap and water. Seek medical attention if irritation persists.

• Eyes: Rinse immediately with flowing water ≥15 min; seek medical advice.

• Inhalation: Move to fresh air; if breathing difficulty occurs, seek medical help.

• Ingestion: Rinse mouth; do NOT induce vomiting. Seek medical advice.

• Transport: Not classified as dangerous goods for transport (non-hazardous per IMDG/IATA/DOT).

• Disposal: Dispose as hazardous chemical waste per local and national regulations.

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