LINEAR ALKYLBENZENE SULFONATE (LAS) - UNEP Chemicals

OECD SIDS LINEAR ALKYLBENZENE SULFONATE (LAS)
Reliability: 2 Valid with restrictions. Standard EPA estimation software.
(e)
Value: 290 o C
Decomposition: Not identified
Method: Estimation: EPI Suite (Mean or Weighted MP)
GLP: Yes [ ] No [X] ? [ ]
Test Substance: C13 LAS (CAS #26248-24-8)
Remarks: Structure modeled is the pure C13 sodium salt homologue, 2-phenyl isomer,
not the commercial material.
Reference: USEPA. 2000. EPI Suite v3.10.
Reliability: 2 Valid with restrictions. Standard EPA estimation software.
2.2 BOILING POINT
(a)
Decomposition: Onset at 444 o C (47% weight loss at 500 o C)
Method: Thermal analysis was performed on the Netzsch DSC 204C and TG209C
with N2 atmosphere.
GLP: Yes [ ] No [X] ? [ ]
Test Substance: C10-14 monoalkylbenzene sulfonic acid, sodium salt (CAS #85117-50-6);
mean molecular weight = 348, average alkyl chain length = C12.0. The test
material is a commercial product, contains 85% active matter and is a coarse,
cream-colored powder at 25 o C.
Remarks: Note that the activity represents the total percent active materials (LAS, iso-
LAS and DATS) in the test substance. The nonactive material in a powdered
sample of LAS is likely sodium sulfate and other salts which have very high
melting points (e.g., sodium sulfate = 884°C) and would not interfere with
the measurement of the LAS melting point.
Reference: Huntsman. 2002. Report of melting point analysis for NANSA HS 85/5.
Cover memo from A. Ashworth to K.B. Sellstrom dated April 12, 2002.
Reliability: 2 Valid with restrictions
(b)
Value: 630 o C
Method: Estimation: EPI Suite (Adapted Stein & Brown method)
GLP: Yes [ ] No [X] ? [ ]
Test Substance: C10 LAS (CAS #1322-98-1)
Remarks: Structure modeled is the pure C10 sodium salt homologue, 2-phenyl isomer,
not the commercial material.
Reference: USEPA. 2000. EPI Suite v3.10.
Reliability: 2 Valid with restrictions. Standard EPA estimation software.
(c)
Value: 642 o C
Method: Estimation: EPI Suite (Adapted Stein & Brown method)
GLP: Yes [ ] No [X] ? [ ]
Test Substance: C11 LAS (CAS #27636-75-5)
Remarks: Structure modeled is the pure C11 sodium salt homologue, 2-phenyl isomer,
not the commercial material.
Reference: USEPA. 2000. EPI Suite v3.10.
Reliability: 2 Valid with restrictions. Standard EPA estimation software.
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