1. Product Identification
Chemical Name: Potassium Bromide
Synonyms: Bromide salt of potassium, KBr
Chemical Formula: KBr
Molecular Weight: 119.01 g/mol
CAS Number: 7758-02-3
EC Number: 231-830-3
2. Physical Properties
Appearance: White crystalline powder
Odor: Odorless
Taste: Salty and slightly bitter
Density: 2.75 g/cm³ (25°C)
Melting Point: 730°C
Boiling Point: 1435°C
Solubility:
Water: Soluble
Glycerol: Soluble
Ethanol: Insoluble
Diethyl ether: Insoluble
pH (10% solution): Neutral to slightly acidic/basic (varies by grade)
3. Chemical Properties
Stability: Stable under normal conditions.
Reactivity: Reacts with strong acids (e.g., H₂SO₄) to release HBr gas. Decomposes upon heating to produce toxic bromine fumes.
Incompatibility: Avoid contact with oxidizing agents, acids, and organic materials.
4. Specifications by Grade
| Item | High Grade | Grade A | Photo Grade I | Photo Grade II |
|---|---|---|---|---|
| Appearance | White crystal | White crystal | White crystal | White crystal |
| Assay (KBr) %≥ | 99.0 | 98.5 | 99.5 | 99.0 |
| Water Content %≤ | 0.3 | 0.5 | - | - |
| Chloride (Cl⁻) %≤ | 0.1 | 0.5 | 0.2 | 0.5 |
| Sulfate (SO₄²⁻) %≤ | 0.01 | 0.02 | 0.002 | 0.005 |
| Iodide (I⁻) %≤ | 0.006 | 0.01 | 0.005 | 0.01 |
| Bromate (BrO₃⁻) %≤ | 0.003 | 0.005 | 0.001 | 0.003 |
| Heavy Metals (Pb) ppm≤ | 4 | 5 | 0.2 | 0.5 |
| Iron (Fe) ppm≤ | 4 | 5 | 0.5 | 1 |
| Clarity | - | - | Pass | Pass |
| pH Value | 5.5-7.5 | 5.0-8.0 | 5.5-6.5 | 5.5-6.5 |
5. Applications
Photography: Used in photographic emulsions and film developers.
Pharmaceuticals: As a sedative in medical care.
Industrial: Various applications requiring bromide salts.
6. Safety Information
GHS Classification:
Skin Corrosion/Irritation: Category 2
Serious Eye Damage/Irritation: Category 2A
Specific Target Organ Toxicity (Single Exposure): Category 3
Hazard Symbols: Xi (Irritant), C (Corrosive)
Safety Precautions:
Wear protective gloves, goggles, and a mask.
Avoid inhalation of dust; use in a well-ventilated area.
First Aid:
Skin/Eye Contact: Rinse with water for ≥15 minutes.
Inhalation: Move to fresh air; seek medical attention if symptoms persist.
Ingestion: Do NOT induce vomiting; rinse mouth and seek immediate medical help.
7. Storage & Handling
Storage: Keep in a cool, dry place, tightly sealed. Protect from moisture and light.
Shelf Life: 36 months when stored properly.
Handling: Avoid dust formation. Use non-sparking tools.
8. Packaging
Standard Packaging: 25 kg bags (inner plastic bag, outer woven bag).
Custom Options: Available upon request.
9. Regulatory Compliance
Meets pharmacopoeial standards (USP/EP/BP).
Complies with REACH, RoHS, and relevant international regulations.
10. Disposal
Dispose of in accordance with local/national regulations. Avoid releasing into the environment.
Note: This document is for informational purposes only. Users should conduct their own testing to ensure suitability for specific applications.
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Richard Han
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