Carbon Tetrachloride Reagent HPLC
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It is critically important to clarify a fundamental chemical incompatibility first:
Carbon Tetrachloride ($CCl_4$) is NOT used as a solvent in High-Performance Liquid Chromatography (HPLC).
In fact, it is strictly prohibited in modern HPLC laboratories for the following reasons:
- High UV Absorption: Carbon tetrachloride has a very low UV cutoff wavelength (absorbs strongly below ~240 nm) and high viscosity, making it transparent only in a narrow range. More importantly, it is non-polar and incompatible with most HPLC stationary phases and detectors.
- Detector Interference: It interferes severely with UV-Vis, RI (Refractive Index), and especially MS (Mass Spectrometry) detectors due to high background noise and fragmentation.
- Safety & Environmental Bans: Carbon tetrachloride is a known carcinogen, hepatotoxin, and ozone-depleting substance. Its use is heavily restricted or banned under international agreements (e.g., Montreal Protocol) and safety standards (OSHA, EPA).
- Material Compatibility: It can degrade certain seals and tubing in HPLC systems.
β What You Likely Meant:
You probably need HPLC-grade solvents that are used in non-polar or reverse-phase HPLC. The most common solvents for such applications are:
| Solvent | HPLC Grade | Typical Use in HPLC | Notes |
|---|---|---|---|
| Methanol | HPLC Grade | Reverse-phase HPLC (RP-HPLC), strong solvent | Low UV cutoff (~205 nm), widely used |
| Acetonitrile | HPLC Grade | Reverse-phase HPLC, low viscosity, excellent peak shape | Lower viscosity than methanol, preferred in MS |
| Isopropanol (IPA) | HPLC Grade | Non-polar analytes, size-exclusion chromatography | Higher UV cutoff (~210 nm) |
| Hexane | HPLC Grade | Normal-phase HPLC (NP-HPLC), non-polar separations | Not for UV detection below 210 nm |
| Chloroform | HPLC Grade | Normal-phase or special applications | Caution: Not for MS, high UV cutoff (~245 nm) |
π If You Need Carbon Tetrachloride for Other Purposes (NOT HPLC):
- Historical use: Formerly used as a solvent in gravimetric analysis or for dissolving non-polar compounds.
- Modern alternative: Use dichloromethane (DCM) or chloroform for non-polar extractions, but never for HPLC.
π HS Code & Tax Classification (For Import/Export Purposes)
If you are importing Carbon Tetrachloride as a reagent (not for HPLC), here is the correct classification:
π₯οΈ Carbon Tetrachloride (Reagent Grade)
π HS Code Reference & Customs Guidance | 2026 Classification
π Product Definition:
Carbon tetrachloride ($CCl_4$) is a halogenated organic compound, historically used as a solvent, degreaser, and chemical intermediate. As a reagent, it is classified under Chapter 29 (Organic Chemicals).
π¦ HS Code Classification (2026 Harmonized System)
| HS Code | Description | Notes |
|---|---|---|
2903.30.00 |
Halogenated derivatives of hydrocarbons, containing only chlorine | Includes Carbon Tetrachloride ($CCl_4$) |
2903.30.20 |
Carbon tetrachloride (ifη»ε at national level) | Verify with local customs |
β οΈ Key Note:
- Carbon tetrachloride is strictly regulated under environmental laws. Import may require EPA permit or equivalent national environmental clearance. - Many countries ban or restrict its import due to ozone depletion and toxicity.
π° Tariff & Tax Details (Example: United States)
π― HS Code: 2903.30.00 β Halogenated Hydrocarbons
| Item | Detail |
|---|---|
| Base Duty Rate | 0%β5% (varies by trade agreement) |
| Section 301 Tariff (China Origin) | +25% (if originating from China) |
| Environmental/Eco Tax | May apply under EPA regulations |
| Total Effective Rate | 25%β30% (including surcharges) |
| Special Notes | High regulatory scrutiny β Requires import permit in many jurisdictions |
π Legal Basis:
-HTSUS: 2903.30.00
-Section 301: USITC Footnote 4
-EPA Reporting Requirements
π οΈ Customs Clearance Recommendations
β Required Documentation
| Document | Purpose |
|---|---|
| Material Safety Data Sheet (MSDS) | Proof of handling safety |
| Import Permit (EPA) | Environmental compliance |
| Commercial Invoice | Must state "Carbon Tetrachloride, Reagent Grade" |
| Certificate of Analysis | Purity level (e.g., 99.5%) |
| Packaging Declaration | Hazardous material compliance (UN 1846) |
β Declaration Tips
- HS Code:
2903.30.00 - Description: "Carbon Tetrachloride, Reagent Grade, for Laboratory Use Only"
- Do NOT declare as HPLC solvent β it will be rejected or delayed.
β οΈ Critical Warnings
- Not for HPLC: Using $CCl_4$ in HPLC will damage your instrument and invalidate results.
- Regulatory Risk: Many countries ban import of $CCl_4$. Check local environmental laws.
- Safety: Handle in fume hood, wear PPE. It is carcinogenic and toxic.
π Global Market Comparison (2026)
| Country | HS Code | Duty | Restrictions |
|---|---|---|---|
| πΊπΈ USA | 2903.30.00 |
0% + 25% (China) | EPA Permit Required |
| πͺπΊ EU | 2903.30.00 |
0% | REACH Registration Required |
| π¨π³ China | 2903.30.00 |
0% | Controlled substance |
| π―π΅ Japan | 2903.30.00 |
0% | Strict handling regulations |
π Final Recommendation
β Do NOT use Carbon Tetrachloride in HPLC.
β Use HPLC-grade Methanol, Acetonitrile, or Hexane instead.
β If importing $CCl_4$ for non-HPLC use, ensure full environmental compliance and declare correctly under2903.30.00.
For HPLC applications, consult your method development guide for HPLC-grade solvents only.
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.