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DL-LACTONE CAS N°:79-50-5 - page 24 / 113

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OECD SIDS 1. GENERAL INFORMATION

DL-LACTONE

ID: 79-50-5 DATE: 18.01.2006

Reliability:

(1)

valid without restriction

Database maintained reliable.

by

government

agencies,

considered

fully

13-JUN-2005

(48)

Type: Additional Info:

Poisonous Chemicals List (Switzerland) Not listed.

Reliability:

(1)

valid without restriction

Database maintained reliable.

by

government

agency,

considered

fully

13-JUN-2005

(53)

Type:

EINECS

Additional Info:

no. 201 210 7

Reliability: 16-AUG-2004

Type: Additional Info:

Reliability: 16-AUG-2004

Type:

without

restriction

without

restriction

other: ASIA-PAC

(1)

valid

ENCS no. 9-997X

(1)

valid

(15)

(44)

(44)

16-AUG-2004

(44)

1.9.1 Degradation/Transformation Products

Type: CAS-No: EINECS-Na

me:

degradation product in water 470-29-1 Butanoic acid, 2,4-dihydroxy-3,3-dimethyl-

IUCLID Chapter:

3.1.2 Stability in Water

Remark:

2,4-Dihydroxy-3,3-dimehtyl-butanoic acid (=pantoic acid) is the probable hydrolysis product of dl-lactone, through opening of the butyrolactone cyclic ester in the hydrolysis pretest. However, this product was not confirmed analytically.

Reliability:

(2) valid with

restrictions

Highly probable

from a chemist's

expectation

but

not

confirmed

through

analytics,

hence

reliability

2.

26-AUG-2004

1.9.2 Components

1.10 Source of Exposure

Source of exposure: Environment: exposure from production

Exposure to the:

Substance

Result:

Based on a production mass balance at the then Roche

manufacturing plant at Dalry for the year 2004, subtracting measured yields from measured educts and incorporating information on measured concentrations in aqueous effluents,

24

UNEP PUBLICATIONS

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