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Chemotechnique Diagnostics, Malmo, Sweden, is recognized around the world as a leader in providing highest quality haptens and accessories to the patch testing medical specialty. Only Chemotechnique's 550 hapten portfolio is approved by Health Canada so practitioners can perform their patch testing with confidence. Chemotechnique's patented leak free "I-Q" chamber is utilized on the most advanced and proven IQ-ULTRA and the water resistant IQ-ULTIMATE chamber formats. Dormer Laboratories Inc., Toronto, Ontario, is Chemotechnique's North American Distributor.
Chemotechnique Diagnostics - the trusted name in patch testing!

NIK-L-BLOK TM Barrier Cream

  • Traps Nickel Ions
  • Traps Cobalt Ions
  • Fragrance Free
Clinically Tested & Proven Effective!
Protects against eczema induced by nickel & cobalt!

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

American Contact Dermatitis Society
Fall Meeting
Friday and Saturday, October 1 and 2, 2021
Wyndham Philadelphia Historic District
400 Arch Street, Philadelphia, PA
(215) 923-8660

32nd Annual Meeting of the
American Contact Dermatitis Society
(ACDS) Thursday, March 18th, 2021
San Francisco, CA (Location and Program to be finalized)

79th Annual Meeting of
American Academy of Dermatology
(AAD) March 18th through 23rd, 2021
The Moscone Center
San Francisco, CA 94103

Canadian Dermatology Association / Association canadienne de dermatologie
96th - 2021: Vancouver, BC - Wednesday, June 23 to Saturday, June 26 - The Westin Bayshore


Effective January 1st, 2020 changes have been made to the following series: B-1000, C-1000, CAD-1000, E-1000, IS-1000, MA-1000, MP-1000, NAP-1000, PG-1000 and TF-1000

Hydrogen Peroxide H-006 is no longer available

Lead(II)acetate trihydrate 0.5%/aq (L-007) removed from the Metal Series. An unanticipated raw material alteration has rendered the possibility of producing Lead(II)acetate trihydrate 0.5%/aq (L-007) to an adequate standard impossible. As a result we have removed this hapten from our portfolio and from the Metal Series MET-1000 immediately. Please note that the Metal Series will still include a hapten marker for lead, L-008 Lead(II)chloride 0.2%/aq.

The hapten DOR-686 Methyldibromo Glutaronitrile + phenoxyethanol (EUXYL K ) is no longer available. However the two components of this hapten mixture are available as D-049E Methyldibromo glutaronitrile (0.5% pet) and P-025 2-Phenoxyethanol (1% pet)  

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