Melting Point

A melting point apparatus is a laboratory instrument used to determine the temperature or temperature range at which a solid substance changes into a liquid. Melting point measurement is widely used for substance identification, purity assessment and quality control in scientific laboratories and industry.

Meteo-Tech offers melting point instruments from KRÜSS Optronic, including the M3000 and M5000 models, designed for laboratory applications in chemistry, pharmaceuticals, research and quality control.

What Is a Melting Point and How Is It Measured?

The melting point is the temperature at which a solid substance changes into a liquid under specified pressure conditions. Pure crystalline substances generally melt within a relatively narrow temperature range.

Melting point determination is a commonly used technique for characterising solid materials in laboratories. It helps identify substances, assess their purity and verify compliance with quality specifications.

How Does a Melting Point Apparatus Work?

Many laboratory melting point instruments use the capillary method, in which a small sample of solid material is placed inside a capillary tube and heated at a controlled rate.

During heating, the melting process is observed, allowing the temperature at which melting begins and the temperature at which the sample becomes completely liquid to be determined.

Advanced melting point instruments may feature digital temperature displays, adjustable heating rates and automatic melting point detection, depending on the model and technical specifications.

Common Applications of Melting Point Instruments

• Pharmaceutical Industry: Melting point determination of raw materials and active pharmaceutical ingredients (APIs) for identification and quality control.

• Chemical Laboratories: Identification and characterisation of organic compounds and solid substances.

• Research and Development: Evaluation of thermal properties during the development of new materials and chemical compounds.

• Chemical Industry: Quality control testing of raw materials and solid chemical products.

• Academic Laboratories: Melting point experiments and educational applications in chemistry laboratories.

How to Choose the Right Melting Point Apparatus

When selecting a melting point apparatus for laboratory use, several factors should be considered:

• Temperature Range: Ensure the instrument covers the expected melting temperatures of the samples.

• Accuracy and Resolution: Select an instrument that meets the required measurement precision.

• Heating Rate: Look for adjustable heating rates to support different testing procedures.

• Sample Capacity: Consider how many samples can be measured during a single test.

• Melting Point Detection: Choose between visual observation and automatic detection, depending on laboratory requirements.

• Data Management: Consider the availability of result storage and documentation features.

Meteo-Tech supplies KRÜSS Optronic melting point instruments for laboratory applications and assists customers in selecting equipment according to their samples, testing procedures and measurement requirements.