Additive index

Term · Chemistry · MLC-T-CHM-000232

A number summarising how toxicants act together in a mixture, calculated by summing, for each toxicant, its concentration divided by its own effect concentration, for instance the LC50, with one toxicant serving as the reference. Marking's version gives zero for simple additivity, a positive value when the mixture acts more strongly than the sum of its parts (synergism), and a negative value when it acts more weakly (antagonism).

Table 1. Record
Identifier	MLC-T-CHM-000232
Field	Chemistry
Subject	Chemistry and Human Health
References	PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 835 (https://doi.org/10.1351/PAC-REC-08-07-09)

Record as JSON

{
  "id": "MLC-T-CHM-000232",
  "term": "Additive index",
  "field": "Chemistry",
  "definition": "A number summarising how toxicants act together in a mixture, calculated by summing, for each toxicant, its concentration divided by its own effect concentration, for instance the LC50, with one toxicant serving as the reference. Marking's version gives zero for simple additivity, a positive value when the mixture acts more strongly than the sum of its parts (synergism), and a negative value when it acts more weakly (antagonism).",
  "subject": "Chemistry and Human Health",
  "references": [
    "PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 835 (https://doi.org/10.1351/PAC-REC-08-07-09)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/additive-index/"
}

Record 244 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.