1.5.6 On-line help – Technical

Posted by Arne Skov on 2015-09-10

1.5.6      On-line help – Technical

The tab called “Technical” includes all of the “technical” information about the substance.


Molecular formula:

The molecular formula summarises the number of different atoms in the substance molecule, shown by the atomic symbols and their different counts.


Index No.:

The Index No. is an identification number used for substances that are officially recognized as dangerous by the European Commission and are entered on the E.C. List of Dangerous Substances (Annex I of directive 67/548/EEC with later adjustments). In the case of 1,4-benzenediamine below, the substance is classified by the E.C. as a substance that is toxic for humans and very toxic for the environment with allergenic and eye irritating properties (T;R23/24/25 Xi;R36 R43 N;R50/53). Substances without Index No. are not yet recognized as dangerous by the E.C., but that does not necessarily mean that they are harmless. In cases like that, the dangerous properties has to be assessed by the supplier of the substance.


SMILES is an acronym, meaning Simplified Molecular Input Line Entry Specification. It represents a valence model of the substance molecule and can be interpreted by computer programs to make a drawing of the molecular structure or a model calculation of physical, chemical and/or dangerous properties. You can get drawings of molecular structures like that of 1,4-benzenediamine by pressing the “Show structure” button. This will bring you directly to a homepage where the structure is depicted.


Colour Index:

The Colour Index Number, often abbreviated as C.I.-No. or just C.I., is the identification number used in Colour Index, the handbook of pigments and dyes first published in 1925, now published on the web by the Society of Dyers and Colourists and the American Association of Textile Chemists and Colorists. Please note that not all pigments and dyes in SPIN have a C.I.-No., either because it has not been registered, or because it has not been assigned for reasons of confidentiality. You can learn more about Colour Index at the homepage http://www.colour-index.org



CSD is an acronym, meaning Chemical Substances Definition. It is used in the European list of existing substances (EINECS) and in the E.C. List of Dangerous Substances to give a more detailed description of naturally or technically occurring mixtures of substances, such as oil fractions derived from crude oil and similar mixtures. An example could be the CSD for “Fuel oil No. 6” with the Index-No. 649-030-00-1 and the CAS-No. 68553-00-4. The CSD for this “substance” says: “A fuel oil with a minimum viscosity of 195 cSt and a maximum viscosity of 1950 cSt at 37,7 ° C”.


Substance category:

The substance category code is a code used by the Danish Product Register to describe the assumed technical function of the substance as a component of a preparation. You can see the full list of substance categories in “3.4 Substance categories (Danish)” in the SPIN guide.


Main category (IUCLID):

Categories of use pattern as recorded in the IUCLID database. IUCLID stands for International Uniform Chemical Information Database. The database has been developed with a view to fulfilling the requirements of Council Regulation (EEC) no. 793/93 on the evaluation and control of the risks of existing chemicals and is situated in ECB, Ispra. You can see the full list of main categories in “3.3 Main Category (IUCLID)” in the SPIN guide.