Decane-1,10-diol

Endpoint summary

Description of key information

No experimental toxicokinetic study is available on 1,10 -decanediol.

However, as per REACH guidance document R7.C (2012), information on absorption, distribution, metabolism and excretion may be deduced from the physicochemical properties.

Based on the toxicological data and the physicochemical properties, the absorption of 1,10 -decanediol is expected by oral route, dermal route and inhalation.

Key value for chemical safety assessment

Bioaccumulation potential:

no bioaccumulation potential

Absorption rate - oral (%):

50

Absorption rate - dermal (%):

10

Absorption rate - inhalation (%):

100

Additional information

No experimental toxicokinetic study is available on 1,10 -decanediol.

However, as per REACH guidance document R7.C (2012), information on absorption, distribution, metabolism and excretion may be deduced from the physicochemical properties, including:

-Mean molecular weight: 174.29 g/mol

-Water solubility: 274 mg/L (20°C)

-Partition coefficient Log Kow: 2.73

-Vapour pressure: 0.00311 Pa (25°C, solid)

 

ABSORPTION

The moderate value of log Kow (2.73) and the moderate solubility (274 mg/L) of 1,10 -decanediol are favorable for a moderate oral and dermal absorption.

In the experimental study, the oral LD50 is higher than 10 000 mg/kg bw, with 2 mortalities observed, suggesting that the substance is really absorbed. 50% of oral absorption is taken into account for the risk assessment (worst case).

In the experimental study by dermal route, no dermal absorption is highlighted : the substance in not irritating in rabbit, not skin sensitizing in guinea pigs, not harmful in rat after a single administration (2000 mg/kg).

However, a molecular mass smaller than 500 g/mol are favourable to a dermal absorption. Indeed, the dermal absorption of 1,10 -decanediol is anticipated to be moderate. That's why 10% of dermal absorption is taken into account for the risk assessment (worst case).

Based on the low vapour pressure (< 0.01 Pa), 1,10 -decanediol is considered to be not a volatile substance. Indeed, the absorption by inhalation can be expected to be low for 1,10 -decanediol. However 100% of absorption is taken into account for the risk assessment (worst case).

DISTRIBUTION

No specific data is available on the distribution of 1,10 -decanediol. No organ toxicity was showed in the repeated toxicity studies.

METABOLISM

No specific data is available on the metabolism of 1,10 -decanediol.

In silico tool (OECD QSAR Toolbox) was used to predict metabolites of 1,10 -decanediol. OECD Toolbox contains simulators of liver metabolism and hydrolysis.

Based on these simulation, no acidic hydrolysis is expected for 1,10 -decanediol.

However, the Rat liver S9 metabolism simulator showed 4 metabolites for 1,10-decanediol. Two of the metabolites are: acetic acid (CAS number 64-19-7), 10-hydroxydecanoic acid CAS number 1679-53-4; no toxicological data was found on this substance). All the other metabolites are not identified, there are probably not stable.

 

ELIMINATION

Due to the moderate water solubility, the excretion of 1,10 -decanediol in the urines is expected to be high.