Company Information After 20 years in the production and development of allergens for patch testing, Chemotechnique Diagnostics have further developed the cooperation with dermatologists practising clinical and experimental patch testing. By cooperating with national contact dermatitis groups in various countries we want to meet the needs specific to different regions. We are guided by national groups and the international group International Contact Dermatitis Research Group (ICDRG). With this in mind we believe ourselves to be as up to date as possible and able to facilitate dermatological investigations where patch tests are involved. Our aim is not only to provide dermatologists with the necessary allergens and Test Chambers for patch testing, but also to actively take part in the development and selection of allergens, with special emphasis in the field of occupational dermatology. Our work is also focused on the standardization of patch test allergens. Product Information Allergens & Skin Marker Chemotechnique Diagnostics takes pleasure in offering the widest range of commercially available allergens for patch testing now expanded to cover more than 350 different allergens. In cooperation with various national Contact Dermatitis Research Groups a number of country specific Standard Series are available in addition to our normal range. The products are available through our extensive network of distributors worldwide. You may download our electronic catalogue in Adobe format from this web site. Patch testing, being the classical method for the diagnosis of contact allergies, is an important tool when investigating contact dermatitis. This test becomes more reliable when using high quality standardised test substances. It is also important that the testing and interpretation of the result is performed by an experienced physician. The raw material used is of the highest purity and treated so that extremely small particles are formed and incorporated in the white petrolatum used as a vehicle. The substances with a petrolatum vehicle are supplied in 5 ml polypropylene syringes, while those in a liquid solution are supplied in 10 ml polypropylene dropper bottles. Allergens used infrequently should be stored in a cool place protected from light. In accordance with their stability, we recommend that all substances should be renewed according to the expiry stated on the labels of the allergens. The petrolatum used as a vehicle is Penreco Snow White, considered to be the purest on the market according to An Dooms-Goossens (Allergic contact dermatitis to ingredients used in topical applied pharmaceutical products and cosmetics: Katholieke Universiteit, Leuven, 1982;Thesis). As a rule, we produce the purest and most homogeneous contamination free allergens. We also provide special Skin Markers for marking the patch test site. The convenient colour marker contains Methylrosaniline and Silvernitrate for prolonged staining of the skin. For dark skin types or when a non staining ink is required we offer a UV Skin Marker. We also produce a Nickel Spot Test (Dimethylglyoxime) for detection of free Nickel in metal objects. Test Chambers Chemotechnique Diagnostics has developed an improved type of test chamber called IQ Chamber. This test unit combines the advantages of using inert square polyethylene chambers attached to a hypoallergenic porous tape with the possibility of reattaching the tape to a stiff plastic cover to prepare test units in advance. For easy and fast loading of the IQ chambers use our Application Device. production, development, allergens,

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