Description
Specifications Table
Product Name – n-Heptane USP
Quantity/Pack Size – 100 ml
Form – Liquid
Grade – USP
Application – Solvent, Chromatography, Calibration
Product Overview
n-Heptane USP is a high-purity, straight-chain aliphatic hydrocarbon solvent widely recognized for its consistent performance in laboratory applications. As a non-polar solvent, it exhibits excellent properties for dissolving non-polar compounds, making it a preferred choice for chromatographic separations, particularly in gas chromatography (GC) as a reference standard. Its low UV absorbance and minimal reactivity ensure reliable results in spectroscopic analysis and calibration procedures. The USP-grade designation guarantees adherence to strict purity standards, with minimal impurities such as sulfur, olefins, and aromatic compounds, which is critical for sensitive analytical techniques. The solvent’s narrow boiling range (98.4°C) provides precise control in distillation and extraction processes, while its low viscosity enhances efficiency in sample preparation. n-Heptane is also valued for its stability under standard laboratory conditions, resisting oxidation and degradation over extended storage periods when properly sealed. Its compatibility with a wide range of organic compounds further extends its utility in synthesis and purification workflows. The 100 ml pack size offers convenience for small-scale experiments while maintaining cost-effectiveness for routine lab use.
FAQs
1. What is the primary difference between n-Heptane USP and technical-grade heptane?
n-Heptane USP undergoes rigorous purification to meet United States Pharmacopeia standards, ensuring minimal impurities like sulfur or aromatics, which are often present in technical-grade variants. This makes it suitable for analytical and regulated applications where consistency is critical.
2. Can n-Heptane USP be used as a substitute for hexane in extractions?
While both are non-polar solvents, n-Heptane has a higher boiling point (98.4°C vs. 69°C for hexane) and slightly different elution properties in chromatography. Substitution may require method validation, especially in temperature-sensitive or GC-based protocols.
3. How should n-Heptane USP be stored to maintain its purity?
Store the solvent in a tightly sealed, amber glass bottle at room temperature (15–25°C), away from direct sunlight, ignition sources, and oxidizing agents. Use within 12 months of opening for optimal performance, and avoid prolonged exposure to air to prevent moisture absorption.
4. Is n-Heptane USP compatible with plastic labware?
n-Heptane can degrade certain plastics like polyethylene or polypropylene over time. For long-term storage or reactions, use glass or PTFE-lined containers. Short-term contact with HDPE is generally acceptable but should be tested for specific applications.
5. What safety precautions are essential when handling n-Heptane USP?
Work in a well-ventilated fume hood due to its volatile nature and potential for inhalation exposure. Wear nitrile gloves, safety goggles, and a lab coat to prevent skin contact. Avoid open flames, as n-Heptane is highly flammable with a low flash point of -4°C.
