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Probable Routes of Human Exposure:


This substance(Calcium dodecylbenzenesulphonate/Benzenesulfonic acid, dodecyl-, calcium salt (CAS#26264-06-2)) is from the group of linear and branched alkylbenzene sulfonates (LAS/ABS) which includesthe followingsix chemicals:


1.Benzenesulfonic acid, dodecyl-, compd. with 2-propanamine (1:1)(CAS#26264-05-1)

2.Benzenesulfonic acid, dodecyl-, compd. with 2,2',2''-nitrilotris[ethanol](1:1)(CAS#27323-41-7)

3.Benzenesulfonic acid, dodecyl-, calcium salt(CAS#26264-06-2)

4. Benzenesulfonic acid, dodecyl-, branched(CAS#68411-32-5)

5. Benzenesulfonic acid, mono-C11-13-branched alkyl derivs.(CAS#68608-88-8)

6. Benzenesulfonic acid, mono-C11-13-branched alkyl derivs., calcium salts(CAS#68953-96-8)


Linear (designated “LAS”) and non-linear or branched (designated “ABS”) alkylbenzene sulfonates are anionic surfactants with molecules characterized by a hydrophobic (apolar) and a hydrophilic (polar) group. As a class of chemicals, they are generally mixtures of closely related isomers and homologues. Each molecule contains an aromatic ring sulfonated at theparaposition and attached to either a linear or a branched alkyl chain at any position except the terminal carbons. Chain lengths vary but are predominantly in the range of C10 to C14. Most commercial LAS/ABS products are mixtures but they can be prepared as pure homologues (e.g., a pure C12). The LAS/ABS chemicals are prepared by sulfonation of linear and non-linear alkylbenzenes. Linear structures of alkylbenzene (sulfonic acid derivatives) are based on the reaction of an alpha olefin (i.e., R-CH=CH2) with benzene, in the presence of sulphuric acid (SO3), with or without a catalyst. Sodium hydroxide (NaOH) or some other salt is used to neutralize.

In addition to the six chemicals, they are several chemicals that are very closely and that can be used to support the LAS/ABS category. These are the chemicals from category of Linear Alkylbenzene Sulfonate (LAS) and the chemicals from category of LAB sulfonic acids.Because of the close structural similarity betweenLAS/ABS category,LAS and the LAB sulfonic acids, data from them are included to provide supporting information for the category.


 The Calcium dodecylbenzenesulphonate (CAS# 26264-06-2) are mixtures of C10 to C14 alkyl benzene sulfonic acids with average alkyl chain lengths of 11.3 to 12.6.


Dietary exposure to (LAS/ABS) respectively to Calcium dodecylbenzenesulphonate can occur from its use in food contact sanitizing solutions as an active ingredient, and as an inert ingredient in food-use pesticide products applied to agricultural crops, and animals. There are no currently registered products used in residential settings where to (LAS/ABS) respectively to Calcium dodecylbenzenesulphonate are considered to be an active ingredient.

However, to  (LAS/ABS) respectively to Calcium dodecylbenzenesulphonate are used as an inert ingredient in pesticide products used inresidential settings, including hard surface and carpet cleaners, lawn products, and pet products.

Post application residential exposure can occur in children from hand-to-mouth incidental oral exposure from treated surfaces, and contacting pets treated with flea and tick products.

Occupational exposure to (LAS/ABS)respectively to Calcium dodecylbenzenesulphonate can occur from mixing /loading /application activities in various use sites, including agricultural food handling, andcommercial/institutional/industrial premises.



Monotoring data

Monitoring is carried out for Dodecylbenzenesulfonic acid CAS 27176-87-0. Monitoring is carried out for also for Sodium dodecylbenzenesulfonate CAS 25155-30-0.

Monitoring data indicate that the general population may be exposed to Dodecylbenzenesulphonic acid/ Sodium dodecylbenzenesulfonate via food contact and kindred product containing Dodecylbenzenesulphonic acid/Sodium dodecylbenzenesulfonate (SRC).

NIOSH (NOES Survey 1981-1983) has statistically estimated that 540,098 workers (153,385 of these are female) are potentially exposed to Calcium dodecylbenzenesulphonate in the(1). Occupational exposure to Calcium dodecylbenzenesulphonate may occur through oral and dermal contact with this compound at workplaces where Calcium dodecylbenzenesulphonate is produced or used(SRC).

Calcium dodecylbenzenesulfonate is manufactured from linear alkylbenzene (LAB) in self-contained, enclosed systems. LAB is produced by reacting paraffins with benzene and a catalyst and isolating the LAB by distillation. The LAB is then sulfonated, which in turn is then neutralized to calcium salts of LAS.

In the Calcium dodecylbenzenesulfonate reaction process, the measured concentrations of SO2, NaOH were 0.0026 and 0.0356 mg/m3, which were below the occupational exposure limit of 0.2 mg/m3 and 2 mg/m3, respectively. And the dust are emitted to atmosphere but the concentration of the substances were below 10% level of environmental emission standard (10 mg/m3).

Worker exposure is extremely limited and highly controlled through the use of engineering controls, personal protective equipment, and use of closed production systems.

There is no consumer exposure to Calcium dodecylbenzenesulfonate since it is not used in consumer products but aDietary exposure to Calcium dodecylbenzenesulfonate can occur from its use in food contactsanitizing solutions as an active ingredient, and as an inert ingredient in food-use pesticideproducts applied to agricultural crops, and animals. There are no currently registered products used in residential settings where to Calcium dodecylbenzenesulfonate is considered to be an active ingredient.







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