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An immune capability developed following an individual's exposure to a specific antigen. Subsequent exposure results in an immune reaction.


A substance that causes an allergic immune response.


A substance that dissolves another substance to form a solution.


Syncope, also known as fainting or swooning, is a temporary or brief suspension of consciousness due to deficiency of oxygen in the brain or sudden lowering of one's blood pressure.

Systemic toxin

A toxin that affects the entire body or many organs.


Synonyms are alternative names that represent the same chemical substance.


SVHC is a substance (identified by the European Chemicals Agency) that may have serious and often irreversible effects on human health and the environment. SVHC are defined in Article 57 of Regulation (EC) No 1907/2006 (“the REACH Regulation”) and include substances which are:
1.  Carcinogenic, Mutagenic or toxic to Reproduction (CMR), meeting the criteria for classification in category 1 or 2 in accordance with Directive 67/548/EEC or in category 1a or 1b in accordance with EC No 1272/2008This directive was recently replaced by the new EU regulation (EC) No 1272/2008.
2.  Persistent, Bioaccumulative and Toxic (PBT) or very Persistent and very Bioaccumulative (vPvB) according to the criteria in Annex XIII of the REACH Regulation, or
3.  Identified, on a case-by-case basis, from scientific evidence as causing probable serious effects to human health or the environment of an equivalent level of concern as those above (e.g. endocrine disrupters).

Safety Phrases (S-)

Safety Phrases, denoted as a series of numbers preceded by the letter "S" indicating the recommended safety precautions, in accordance with Annex IV to Directive 67/548/EEC. The numbers are separated by either a comma to denote separate statements concerning safety precautions, or an oblique stroke (/) to denote a combined statement, in a single sentence, of the safety precautions.

SDS Date

Date that the Safety Data Sheet (SDS) was issued by manufacturer of a specific product.

Safety Data Sheet (SDS)

A Safety Data Sheet (SDS) is a fact sheet developed by manufacturers for all products that contain a chemical and is similar in many aspects to the format and content of Material Safety Data Sheets (MSDS). However, the format and content of SDS are required to be consistent with the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS). The U.S. Occupational Safety & Health Administration has required manufacturers to publish SDS for all their products that contain chemicals with effect from June 15, 2015.