What does „Specific Rotation“ mean?

Some materials like quartz, sucrose solutions or organic compounds are able to rotate the direction of oscillation of polarized light around a determined angle. They are called optically active and can be dextrorotatory or levorotatory.

The specific rotation is a substance-specific physical parameter, which can be determined by a polarimeter. It depends on the temperature and the wavelength of the light. For some samples this value depends on the concentration as well.


Specific rotation is defined as the angle of rotation in degrees of the plane of polarization of monochromatic light passing through a 100 ml long tube containing an optical active substance in solution at a concentration of 1 g/ml.

The specific rotation is e.g. one important parameter to control the purity of optical active substances of incoming products for the production of pharmaceutical and cosmetic products.

Dear valued customer and business friend,

We are taking all possible measures to secure the health of our employees as well as our customers.

As we have already informed you, Schmidt+Haensch remains fully operational.

We are organising whenever possible work from home offices. Our production lines are continuously producing and our supply chains are so far secured.

We are most interested to offer our services as usual. Instead of personal visits we have built up internet communications in order to help you remotely.

All our contacts as well as phone numbers remain accessible.

For service issues please do not hesitate to contact us via e-mail to service@schmidt-haensch.de or telephone under +49 (030) 417 072 – 41 / - 42

For sales inquiries please contact us via e-mail to sales@schmidt-haensch.de or call our sales engineers.

We wish you to stay well and healthy.

Let us try to overcome these most exceptional circumstances by looking after each other with the necessary care and distance.

Best regards

Mathis Kuchejda


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