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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Workers - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
2.64 mg/m³
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
75
Dose descriptor starting point:
NOAEL
Value:
25 mg/kg bw/day
Modified dose descriptor starting point:
NOAEC
Value:
66.12 mg/m³
Explanation for the modification of the dose descriptor starting point:

Due to a lack of experimental data the NOAEC (corr) was derived including ECHAs recommended absorption rates for exposure via the oral (50%) and inhalation (100%) route.

AF for dose response relationship:
1
Justification:
default
AF for differences in duration of exposure:
2
Justification:
default (sub-chronic to chronic)
AF for interspecies differences (allometric scaling):
1
Justification:
Covered by route-to-route extrapolation
AF for other interspecies differences:
2.5
Justification:
default
AF for intraspecies differences:
5
Justification:
default (worker)
AF for the quality of the whole database:
1
Justification:
default
AF for remaining uncertainties:
1
Justification:
no remaining uncertainties identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
skin irritation/corrosion
Acute/short term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
skin irritation/corrosion
DNEL related information

Workers - Hazard via dermal route

Systemic effects

Long term exposure
Hazard assessment conclusion:
DNEL (Derived No Effect Level)
Value:
0.75 mg/kg bw/day
Most sensitive endpoint:
repeated dose toxicity
Route of original study:
Oral
DNEL related information
DNEL derivation method:
ECHA REACH Guidance
Overall assessment factor (AF):
100
Dose descriptor starting point:
NOAEL
Value:
75 mg/kg bw/day
Modified dose descriptor starting point:
NOAEL
Value:
75 mg/kg bw/day
Explanation for the modification of the dose descriptor starting point:

Due to a lack of experimental data the NOAEL (corr) was derived including equal absorption rates for exposure via the oral (100%) and dermal (100%) route.

AF for dose response relationship:
1
Justification:
default
AF for differences in duration of exposure:
2
Justification:
extrapolation from sub-chronic to chronic (default)
AF for interspecies differences (allometric scaling):
4
Justification:
default (rat/human)
AF for other interspecies differences:
2.5
Justification:
default
AF for intraspecies differences:
5
Justification:
default
AF for the quality of the whole database:
1
Justification:
default
AF for remaining uncertainties:
1
Justification:
No remaining uncertainties identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
skin irritation/corrosion
Acute/short term exposure
Hazard assessment conclusion:
medium hazard (no threshold derived)
Most sensitive endpoint:
skin irritation/corrosion

Workers - Hazard for the eyes

Local effects

Hazard assessment conclusion:
medium hazard (no threshold derived)

Additional information - workers

Based on the results from an oral subchronic repeated dose toxicity study in rats the NOAEL was derived to be 75 mg/kg bw/day. Tungsten hexachloride immediately hydrolyses in contact with water, resulting in a marked pH shift (acidification, pH 2-3), which resulted in a positive in vitro skin corrosion test (OECD 431). Thus, the target substance is classified corrosive to the skin (Category 1B/1C). Moreover, classification for H335 is warranted due to the induced acidification.

According to the ECHA Guidance on information requirements and chemical safety assessment Part E: Risk Characterisation (Version 3, May 2016), substances classified for Skin Corrosion Category 1B, Category 1C and H335 (respiratory irritation) are allocated to the moderate hazard band.

General Population - Hazard via inhalation route

Systemic effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

General Population - Hazard via dermal route

Systemic effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

Local effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified

General Population - Hazard via oral route

Systemic effects

Long term exposure
Hazard assessment conclusion:
no hazard identified
Acute/short term exposure
Hazard assessment conclusion:
no hazard identified
DNEL related information

General Population - Hazard for the eyes

Local effects

Hazard assessment conclusion:
no hazard identified

Additional information - General Population

The substance is only used in industrial settings.