Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Info
Name: 1H-Benzotriazole
Alias: BTA, Benzotriazole
CAS No.: 95-14-7
Molecular Formula: C6H5N3
Molecular Weight: 119.13
2. Physical & Chemical Properties
Physical Properties
- Appearance: White to off-white needle crystalline powder, slight bitter odor
- Solubility: Slightly soluble in cold water, soluble in hot water, ethanol, methanol, acetone, chloroform, benzene
- Melting Point: 98–100 ℃
- Boiling Point: Decomposes above 200 ℃
- Density (20℃): 1.27 g/cm3
- Hygroscopy: Slightly hygroscopic under high humidity
- UV characteristic: Strong ultraviolet absorption performance
Chemical Properties
- Molecular structure: Benzene fused triazole heterocycle, contains active N-H bond
- Weak acidity: N-H hydrogen can react with alkali metals/alkali to generate benzotriazolate salts
- Metal chelation: Nitrogen lone pairs form stable adsorption film on copper, brass, bronze surface, excellent copper corrosion inhibition
- Alkylation reaction: Active hydrogen undergoes substitution with halides to produce N-substituted benzotriazole derivatives
- Photostability: Stable under normal light; strong UV long-term irradiation slowly decomposes
- Thermal stability: Stable below 100℃; sublimates and decomposes above melting point
- Compatibility: Compatible with water-based solvents, coating resins; incompatible with strong oxidants, concentrated strong acid
3. Main Application Fields
1. Metal Corrosion Inhibitor (Core Application)
- Copper/copper alloy anti-rust additive for circulating cooling water, cutting fluid, metal polishing liquid
- Circuit board copper foil surface protection agent, prevent copper oxidation discoloration
- Anti-tarnish agent for copper hardware, ornaments, electronic components
2. UV Absorber & Light Stabilizer
Additive for coatings, plastics, adhesives, cosmetics; absorb UV rays to prevent material aging yellowing
3. Organic Synthesis Intermediate
Raw material for synthesizing corrosion inhibitors, pharmaceutical intermediates, pesticide derivatives
4. Water Treatment Agent
Circulating cooling system water quality stabilizer, protect copper pipeline equipment
5. Analytical Reagent
Color developing reagent for heavy metal ion detection in laboratory
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 95-14-7 |
| Molecular Formula | C6H5N3 |
| Molecular Weight | 119.13 |
| Appearance | White needle crystal powder |
| Purity (HPLC) | Industrial Grade ≥99.0%; High Purity Grade ≥99.5% |
| Melting Range | 98.0–100.0 ℃ |
| Moisture Content | ≤0.10% |
| Residue on Ignition | ≤0.05% |
| Heavy Metals (Pb) | ≤10 ppm |
| Bulk Package | 25kg PE lined fiber drum |
| Storage Condition | Hermetic cool dry warehouse ≤25℃; isolate oxidants, humid air |
| Transportation Rule | Heterocyclic solid, moisture-proof sealed packaging |
| Shelf Life | 24 months under intact sealed packaging |
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