California Air Resources Board

Chemical Use Category - The concept of functional group classes was introduced into EICG in 2020 and applies to several chemical “families” of known concern. These families have a portion of their chemical structure that is understood to be the “family trait” (referred to as the chemical “functional group”) that is responsible for similar chemical and biological behavior, both of which give rise to adverse health effects for the entire chemical “family”.

Health Effects - Associated health effects for a given pollutant type.

Reporting Group - The CEIDARS Pollutant table lists all the pollutants maintained in CEIDARS. It shows the pollutant long and short names by pollutant ID. The POLABBREV field or Pollutant Abbreviation, is a shortened version of the pollutant or substance name. The Reporting Group identifies the particular pollutant's Regulatory Group.

Substance Name - Individual substances listed under a group heading must be reported individually.  Other, unspecified substances in the group must be summed and reported using the emittent ID of the group heading.  The square bracket designation, "[ ]", indicates that the substance is a component of the chemical group heading(s) within the brackets.The braces designation, "{ }", indicates a synonym for the substance listed.  

Chemical Use Description – The Use List provides information on how toxic substances are being used. This information in not intended to be exhaustive list but provides insight on how and why the substance is being used (such as industry type, manufacturing process or products).

Chemical Structure – Image of the chemical structure (https://pubchem.ncbi.nlm.nih.gov/).

OEHHA Inhalation Cancer Potency Factor (mg/kg-d)^-1 -The Office of Environmental Health Hazard Assessment) uses the term "Inhalation Cancer Potency Factor" to describe the cancer risk associated with inhaling a specific substance. It's measured in (mg/kg-d)^-1, which represents the inverse of dose. 

OEHHA Inhalation Cancer URF (µg/m3)^-1 - The Office of Environmental Health Hazard Assessment (OEHHA) Cancer Unit Risk Factor (URF) are used to estimate lifetime cancer risks associated with inhalation exposure to a carcinogen.

OEHHA Oral Cancer Slope Factor (mg/kg-d)^-1 -The Office of Environmental Health Hazard Assessment (OEHHA) uses an oral cancer slope factor (OSF) to estimate the increased lifetime cancer risk from oral exposure to a chemical. This OSF is expressed as (mg/kg-d)^-1, meaning it estimates the incremental lifetime risk of cancer per milligram of the chemical ingested per kilogram of body weight per day. The OSF is multiplied by an estimate of lifetime exposure to estimate the lifetime cancer risk.

OEHHA Oral Chronic REL (mg/kg-d) - The Office of Environmental Health Hazard Assessment (OEHHA) Oral Chronic REL is a health-based guideline indicating how much of a specific chemical a person can ingest daily over a prolonged period without expected harmful non-cancer health outcomes. The unit "mg/kg-d" signifies the mass of the chemical (in milligrams) per unit of body weight (in kilograms) consumed per day.  

OEHHA 8-hour Inhalation (µg/m3)^-1 - The Office of Environmental Health Hazard Assessment (OEHHA) 8-hour Inhalation, expressed as the inverse in micrograms per cubic meter (µg/m³)^-1.This value represents an inverse airborne concentration of a chemical at or below which non-cancer health effects are not anticipated for repeated 8-hour exposures.

OEHHA Inhalation Acute REL (µg/m3) - The Office of Environmental Health Hazard Assessment (OEHHA) Acute Reference Exposure Level (REL) is an airborne level exposure that is not likely to cause adverse effects in a human population, including sensitive subgroups, exposed to that concentration for one hour on an intermittent basis.

OEHHA Inhalation Chronic REL (µg/m3) - The Office of Environmental Health Hazard Assessment (OEHHA) chronic Reference Exposure Level (REL) is an airborne level of a chemical at or below which no adverse health effects are anticipated in individuals indefinitely exposed to that level.

Emittent ID: A unique identifier for the emittent or source of the substance. The Emittent ID is also the Chemical Abstract Service (CAS) number.

MW (g/mol): The molecular weight of the substance, a fundamental chemical property.

OEHHA MWAF: The Office of Environmental Health Hazard Assessment (OEHHA) molecular weight adjustment factor (MWAF) is used in risk assessments for toxic metals and their compounds. This adjustment is necessary because OEHHA's health values, such as cancer potency factors and non-cancer Reference Exposure Levels (RELs), are often based on the weight of the toxic metal atom rather than the entire molecular weight of the compound.

Vapor pressure (mmHg) @ 25 ˚C: The vapor pressure of the substance at 25 degrees Celsius, indicating its volatility. This is a crucial property for assessing potential inhalation exposure.

M.p. (˚C): The melting point in degrees Celsius, the temperature at which the substance changes from a solid to a liquid.

B.p. (˚C): The boiling point in degrees Celsius, the temperature at which the substance changes from a liquid to a gas.

Solubility: Information on how the substance dissolves, particularly its reactivity or solubility in water or organic solvents, which is important for understanding its behavior in the environment and biological systems.

Approved Methods for Sampling & Laboratory Analysis: Contains a list of standard or approved methods for collecting samples of the substance from the environment (e.g., air) and analyzing them in a laboratory.

Summary of Analytical Method: A brief description of the analytical technique used to measure the substance. This provides insight into the instrumentation and process involved in identifying and quantifying the chemical in a sample (e.g., GC/MS, HPLC, ion selective electrode).