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Chemotechnique Diagnostics (CT) is recognized as the world's leading patch test company with the most complete range of 550 haptens distributed in over 90 countries. These contamination free haptens, test chambers and accessories are produced under stringent GMP pharmaceutical controls. CT functions under the ISO13485 and ISO9001 Quality Management systems. CT is audited and licensed by the Medical Products Agency (MPA), "Sweden's FDA". CT is committed to the global advancement of contact dermatitis and the field of occupational dermatology through its extensive Research and Development program. To this end CT works cooperatively with the world's leading contact dermatitis associations (ICDRG - International Contact Dermatitis Research Group; EECDRG - European Environmental and Contact Dermatitis Research Group; NACDG - North American Contact Dermatitis Group) to facilitate dermatological investigations where patch tests are involved.
Chemotechnique Diagnostics - the trusted name in patch testing!

When is an
An important change in terminology.

The traditionally used "Allergen" should be replaced by the correct descriptor "Hapten".

Haptens are substances incapable of inducing an immunologic reaction in diagnostic in vivo testing as a stand alone compound.

A hapten needs to bind with a protein forming a hapten-protein complex to become an antigen capable of eliciting a Type 4 allergic reaction and this bond depends on individual biological factors in the patient being patch tested.

An allergen is a high molecular compound defined as a full antigen with a capability to elicit Type 1 allergic reaction during the prick test procedure. Some examples of common allergens are pollens, cat dander and dust mites.

Why should "Hapten" be used?

First, it is the correct scientific description for the substances used in patch testing.

Second, it is important to differentiate "hapten" from "allergen" for regulatory clarity and correct classification.


The Hydroperoxides of Linalool and Limonene

Linalool is a naturally occurring terpene alcohol chemical found in many flowers and spice plants with many commercial applications, the majority of which are based on its pleasant scent.
Limonene takes its name from the lemon, as the rind of the lemon, contains considerable amounts of this compound, which contributes to the odor.
Both fragrances are very common in cosmetic products, such as perfumes and creams. The hydroperoxides are formed when Limonene and Linalool are exposed to sunlight and air.
Now available as H-031 -Hydroperoxides of Linalool and H-032 -Hydroperoxides of Limonene


Meetings & Conventions

29th Annual Meeting of the
American Contact Dermatitis Society
(ACDS) Thursday, February 15th, 2018
San Diego, CA
Location and meeting details to follow
Meeting and Exhibit hours: 7am Registration open - Meeting ends 5pm followed by Networking

76th Annual Meeting of
American Academy of Dermatology
website: - 2017 annual meeting (AAD)
February 16th through 18th, 2018
San Diego Convention Center
San Diego, CA 92101
Telephone: (202) 249-3000
Exhibit Hours:
  • Friday February 16th 10.00 am-5.00 pm
  • Saturday February 17th 10.00 am-5.00 pm
  • Sunday February 18th 10.00 am-3.00 pm
Visit: Chemotechnique Diagnostics AB / Dormer Laboratories Inc., Booth 2916

92nd Annual Meeting of
Canadian Dermatology Association
June 21st though - 24th, 2017
Fredericton, NB (Site and schedule to be determined)



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