Reference

Glossary & Abbreviations

101 technical terms · 66 abbreviations.

ABS: Alkylbenzene sulfonate; the branched-chain predecessor of LAS, now largely phased out due to poor biodegradability.
Acid slurry: The sulfonation product of linear alkylbenzene (LAB) with oleum or SO₃; contains LABSA and small amounts of unsulfonated matter and sulfuric acid.
Active matter (AM): The percentage of surface-active agent in a commercial surfactant product as determined by two-phase titration (ISO 2271) or solvent extraction.
AES: Alcohol ethoxysulfate; anionic surfactant produced by sulfation of fatty alcohol ethoxylates.
AEO: Alcohol ethoxylate; nonionic surfactant produced by ethoxylation of fatty alcohols with ethylene oxide.
Agglomeration: A dry-mixing process in which fine powder particles are wetted with a binder solution (often surfactant) to form larger, free-flowing granules.
Alkalinity reserve: The buffering capacity of a detergent product, typically expressed as the amount of acid (in milliequivalents) required to lower the pH of a 1 % solution from its initial value to pH 7.0.
Amphoteric surfactant: A surfactant whose charge depends on solution pH; exhibits cationic behaviour at low pH and anionic behaviour at high pH. See also: zwitterionic surfactant.
Anionic surfactant: A surface-active agent carrying a negative charge in aqueous solution; examples include LAS, SLES, and soap.
APG: Alkyl polyglucoside; a nonionic surfactant synthesized from fatty alcohols and glucose, valued for mildness and renewable feedstock origin.
APCI: Atmospheric-pressure chemical ionisation; a mass-spectrometry technique used for surfactant molecular-weight distribution analysis.
ASE: Alcohol sulfate; the generic anionic surfactant class formed by sulfation of fatty alcohols without prior ethoxylation (e.g., SDS).
Builder: An inorganic or organic compound that sequesters or precipitates calcium and magnesium ions, preventing surfactant inactivation by water hardness.
CAPB: Cocamidopropyl betaine; a zwitterionic surfactant used as a foam booster and mildness agent.
Carbon black stain test: A standard detergency test (ASTM D3050) using carbon-soiled cloth to evaluate soil-removal performance under controlled conditions.
Cationic surfactant: A surface-active agent carrying a positive charge in aqueous solution; used mainly in fabric softeners and disinfectants.
CED: Cation exchange density; the theoretical capacity of a zeolite builder to exchange Ca²⁺ ions, expressed as mg CaCO₃ per g zeolite.
CFC: Critical micelle concentration; the concentration above which surfactant molecules aggregate into micelles in solution. See also: micelle.
Cloud point: The temperature above which a nonionic surfactant solution becomes turbid due to reduced water solubility of the ethoxylated chain.
CoA: Certificate of Analysis; a document provided by a raw-material supplier stating tested properties against agreed specifications.
CMC: Critical micelle concentration; see CFC.
Co-surfactant: A secondary surfactant added to modify the primary surfactant’s properties (foam, viscosity, mildness) rather than to provide the bulk of detergency.
DEFRA: UK Department for Environment, Food & Rural Affairs; the competent authority for REACH enforcement in the United Kingdom.
Detergency: The composite process of wetting, emulsification, solubilisation, and suspension that removes soil from a substrate.
DRF: Detergent Reference Formulation; the standardised formulation used as a benchmark in inter-laboratory cleaning-performance studies.
DSBP: Disodium bibenyl disulfonate; a fluorescent whitening agent (FWA) used in laundry detergents.
DWL: Dishwashing liquid; a hand-dishwashing detergent formulation optimised for high foam and grease cutting at low dosage.
EC₅₀: Effective concentration 50; the concentration of a substance that produces a specified effect in 50 % of a test population; used in ecotoxicity assessments.
ECHA: European Chemicals Agency; manages the technical, scientific, and administrative aspects of REACH.
EINECS: European Inventory of Existing Commercial Chemical Substances; the precursor to the REACH inventory.
Enzyme stability: The resistance of an enzyme to denaturation by temperature, pH, surfactant interaction, or proteolytic degradation during storage.
EO: Ethylene oxide; the monomer used to ethoxylate fatty alcohols and alkyl phenols, producing nonionic surfactants.
EPA: US Environmental Protection Agency; regulates detergent ingredients under TSCA and FIFRA (for antimicrobial claims).
Eutrophication: The enrichment of water bodies with nutrients (especially phosphorus and nitrogen), leading to excessive algal growth and oxygen depletion.
FAP: Fatty acid profile; the gas-chromatographic determination of carbon-chain distribution in a fatty acid or fatty alcohol sample.
FFA: Free fatty acid; unreacted fatty acid remaining in a surfactant or soap product, measured by acid-value titration.
FIFRA: Federal Insecticide, Fungicide, and Rodenticide Act; US legislation governing detergent products that make sanitisation or disinfection claims.
Flash point: The lowest temperature at which a liquid produces sufficient vapour to form an ignitable mixture with air near its surface.
Foam booster: An additive (typically amphoteric or alkanolamide surfactant) that increases the volume and stability of foam produced by an anionic surfactant system.
Foam suppressor: An additive (typically silicone-based or soap-based) that reduces foam generation, used in automatic dishwasher and machine-wash formulations.
FWA: Fluorescent whitening agent; see optical brightener.
GLP: Good Laboratory Practice; a quality system governing the organisational process and conditions under which non-clinical laboratory studies are planned, performed, and reported.
HLB: Hydrophilic-lipophilic balance; an empirical scale (0–20) indicating the relative affinity of a surfactant for water versus oil.
HPLC: High-performance liquid chromatography; the standard instrumental method for quantifying surfactant mixtures in detergent products.
Hydrotrope: A short-chain aromatic sulfonate (e.g., sodium xylene sulfonate) that increases the solubility of surfactants and other organics in water.
I&I: Industrial and institutional; the market segment encompassing detergents used in hospitals, hotels, food-processing plants, and commercial laundries.
IEC: Ion-exchange capacity; the quantity of exchangeable ions per unit mass of a zeolite or ion-exchange resin, expressed in meq/g.
ISO 2271: International standard for the determination of anionic-active matter by direct two-phase titration.
ISO 4320: International standard for the determination of cloud-point temperature of nonionic surfactants.
Klett colour: A photometric colour scale (0–1,000) used to measure the colour of surfactant solutions, particularly LABSA and LAS.
Kraft point: The temperature above which the solubility of an ionic surfactant increases sharply, corresponding to the melting of the surfactant hydrated crystal lattice.
LAB: Linear alkylbenzene; the hydrocarbon precursor to LABSA, produced by alkylation of benzene with linear C10–C14 olefins.
LABSA: Linear alkylbenzene sulfonic acid; the primary anionic surfactant acid form, subsequently neutralised to sodium or other salts.
LAS: Linear alkylbenzene sulfonate; the sodium salt of LABSA, the most widely produced anionic surfactant globally.
LC₅₀: Lethal concentration 50; the concentration of a substance that is lethal to 50 % of a test organism population under standard exposure conditions.
Loading factor: The ratio of surfactant active matter to builder in a detergent formulation; influences detergency, cost, and environmental profile.
LOQ: Limit of quantification; the lowest concentration of an analyte that can be determined with acceptable precision and accuracy under stated conditions.
MES: Methyl ester sulfonate; an anionic surfactant produced from palm or tallow fatty acid methyl esters via sulfonation and neutralisation.
Micelle: A colloidal aggregate of surfactant molecules in solution, with hydrophobic tails oriented inward and hydrophilic head groups outward.
Molar ethoxylation: The average number of moles of ethylene oxide added per mole of hydrophobe in an ethoxylated surfactant.
NIOSH: National Institute for Occupational Safety and Health; US federal agency that conducts research and makes recommendations for the prevention of work-related injury and illness.
Nonionic surfactant: A surface-active agent that does not ionise in aqueous solution; typically an ethoxylated alcohol or alkylphenol.
NOx: Nitrogen oxides; atmospheric pollutants produced during high-temperature combustion processes, including spray-drying of detergent powders.
OECD 301: Organisation for Economic Co-operation and Development test guideline for ready biodegradability of organic chemicals.
Optical brightener: A fluorescent compound (e.g., stilbene derivative) that absorbs UV light and emits blue visible light, masking yellowing on fabrics.
OSHA: Occupational Safety and Health Administration; US federal agency that sets and enforces workplace safety standards, including those for chemical manufacturing.
pC: The negative logarithm of the molar concentration of a species; pCa = −log[Ca²⁺], used to express builder sequestration efficiency.
PDI: Polydispersity index; the ratio of weight-average to number-average molecular weight (M_w / M_n), indicating the breadth of molecular-weight distribution in a polymer or surfactant.
Peracid: An organic acid containing the peroxy group (–CO₃H); formed in situ from percarbonate or perborate precursors and an activator (TAED) during the wash cycle.
PPE: Personal protective equipment; garments, gloves, goggles, and respirators worn to minimise chemical exposure in manufacturing environments.
ppm: Parts per million; a concentration unit equivalent to mg/L for dilute aqueous solutions.
REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals; the European Union regulation (EC 1907/2006) governing the manufacture and import of chemical substances.
Refractive index: The ratio of the speed of light in vacuum to that in a medium; used as a rapid, non-destructive test for surfactant concentration.
Rinse aid: An additive for automatic dishwashers that reduces water surface tension, promoting sheet drainage and preventing water-spot formation on glassware.
Saponification: The alkaline hydrolysis of fats or oils to produce soap (fatty acid salts) and glycerol.
SAS: Secondary alkane sulfonate; an anionic surfactant produced by sulfochlorination or sulfoxidation of paraffin hydrocarbons.
SBR: Sodium borohydride reduction; a method for determining unsulfonated matter in LAS products.
SED: Soil entrainment device; a laboratory apparatus for measuring the removal of standard soils from test fabrics under controlled wash conditions.
SDS: Sodium dodecyl sulfate (also called sodium lauryl sulfate, SLS); an anionic surfactant with a single C12 chain and no ethoxylation.
Sequestration: The binding of metal ions (especially Ca²⁺ and Mg²⁺) in soluble complexes by chelating agents such as EDTA, citrate, or polyphosphate.
Shelf life: The period during which a product retains its specified properties under defined storage conditions.
Slurry: A pumpable suspension of solid particles in a liquid; in detergent manufacture, typically refers to the concentrated surfactant-builder paste fed to a spray dryer.
Soap: The sodium or potassium salt of a fatty acid; historically the first detergent surfactant.
SO₃ sulfonation: The reaction of an organic substrate (fatty alcohol, LAB, methyl ester) with sulfur trioxide to produce a sulfonic acid or sulfate.
Spray drying: The process of atomising a detergent slurry into a hot gas stream to produce hollow, low-density granules (beads) with rapid dissolution properties.
STPP: Sodium tripolyphosphate; an inorganic builder and water softener, historically the dominant phosphate builder, now restricted in many jurisdictions due to eutrophication concerns.
Sulfation: The introduction of an –OSO₃H (sulfate) group into an organic molecule; distinct from sulfonation, which introduces –SO₃H (sulfonate).
Sulfonation: The introduction of a –SO₃H (sulfonate) group into an aromatic ring or alkane chain; produces more hydrolytically stable anionics than sulfation.
Super-fatting: The addition of excess fatty material (oils, esters, or fatty acids) to a personal-cleansing formulation to mitigate surfactant-induced skin dryness.
Surfactant: A surface-active agent that reduces the interfacial tension between two phases (liquid–liquid, liquid–gas, or liquid–solid).
TAED: Tetraacetylethylenediamine; an organic peracid precursor that activates percarbonate/perborate bleach systems at low temperatures (≤60 °C).
Titration, two-phase: A volumetric analysis in which anionic surfactant is titrated with a cationic titrant (Hyamine 1622) in a water/chloroform two-phase system, with an indicator (mixed blue) signalling the endpoint.
Total active matter: The sum of all surface-active ingredients (anionic, nonionic, amphoteric) in a finished product, determined by a combination of ISO 2271 (anionic) and potentiometric titration (nonionic).
TSCA: Toxic Substances Control Act; US federal law regulating the introduction of new or existing chemical substances.
Turbidity: The cloudiness of a solution caused by suspended particles or the onset of micellar phase separation; measured in nephelometric turbidity units (NTU).
UVCB: Substances of Unknown or Variable composition, Complex reaction products or Biological materials; a REACH classification for surfactants derived from natural feedstocks.
Viscosity builder: An additive (salt, polymer, or amphoteric surfactant) that increases the apparent viscosity of a liquid detergent without gelation.
Wash liquor: The aqueous solution containing dissolved or suspended detergent during the washing process.
Water of hydration: Water molecules chemically bound within a crystal lattice (e.g., STPP hexahydrate, zeolite water).
Zeolite: A crystalline aluminosilicate mineral used as a phosphate-free builder; sequesters Ca²⁺ and Mg²⁺ by ion exchange.
Zwitterionic surfactant: A surfactant carrying both a positive and a negative charge simultaneously, independent of pH; CAPB is the most common example in detergent applications.