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DL-LACTONE CAS N°:79-50-5 - page 34 / 113

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OECD SIDS 2. PHYSICO-CHEMICAL DATA

DL-LACTONE

ID: 79-50-5 DATE: 18.01.2006

05-JAN-2006

(43)

2.10 Explosive Properties

Method: Year: GLP:

other: Hartmann tube dust explosi 1979 no

Test substance:

as prescribed by 1.1 - 1.4

Result:

Method:

Result:

Test substance: Conclusion:

Reliability:

25-AUG-2004

other: moderate dust explosion ha

Exactly measured amounts of test Hartmann apparatus, a dust aeroso blast and a high-voltage electric in the aerosolised dust. The occu of a dust explosion was determine (or not) and its rate of the cove dl-Lactone produced a moderate du concentrations of 500 g/m3 and hi dl-Lactone technical, purity 98.9 Crystalline dl-lactone has a cert Dry dl-lactone must therefore onl and organisational precautions, e possibly under inert gas atmosphe installations and handling precau

Professional

industry

safety

labo

restrictions

dust

formation.

(2)

valid with

zard

on test

substance were placed in the l was produced with an air al discharge produced a spark rrence, rapidity and strength d by measuring the opening r of the Hartmann tube. st explosion at dust gher. % according to ain dust explosion hazard. y be handled with technical g, closed systems, if re, with grounding of all tions to avoid and minimise

ratory standard test.

(57)

    • 2.11

      Oxidizing Properties

    • 2.12

      Dissociation Constant

Method: Year: GLP:

other: QSAR calculation 2004 no

Test substance:

as prescribed by 1.1 - 1.4

Acid-base Const.: acidic group pKa >= 13.1

Result:

QSAR pKa for acidic group

Source

13.11±0.20 13.2 >14

SciFinder (ACD Solaris V4.67) Willems (1999): PKalc 2.0 SPARC On-Line

Conclusion:

Based on accepted QSAR programs, the acidic dissociation constant pKa for dl-lactone is expected to be greater than 13.

Therefore, dl-lactone is not expected to be present

ionised, charged for at environmentally

relevant

pH

in ranges.

Reliability:

(2)

valid with restrictions

Flag: 17-AUG-2004

Accepted Critical

QSAR programmes. study for SIDS endpoint

(44)

(46)

(62)

2.13 Viscosity

34

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