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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

repeated dose toxicity: inhalation
other: prediction from hazard class
Type of information:
calculation (if not (Q)SAR)
Migrated phrase: estimated by calculation
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: calculation tool MeClas ( is used
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study

Data source

Reference Type:
other: software

Materials and methods

Principles of method if other than guideline:
The C&L for toxic to specific target organ after repeated dose application of "Slags, precious metal refining" was determined by using the “Classification criteria for mixtures” of Regulation (EC) 1272/2006 section “Classification of mixtures when data are available for all components or only for some components of the mixture”. For detailed information for classification strategy of UVCBs please refer to IUCLID section 13 (attachment “PMC Classification method”).
GLP compliance:

Test material

Constituent 1
Reference substance name:
Slags, precious metal refining
EC Number:
EC Name:
Slags, precious metal refining
Cas Number:
Molecular formula:
Not aplicable (a generic molecural formula cannot be provided for this specific UVCB)
Slags, precious metal refining
Test material form:
other: solid
Details on test material:
see "confidential details on test material"

Results and discussion

Target system / organ toxicity

Critical effects observed:
not specified

Any other information on results incl. tables

"Slags, precious metal refining" is a complex metal containing UVCB substance with wide concentration ranges for each constituent. Each individual constituent of " Slags, precious metal refining " may contribute (as 'relevant' component) to the UVCB toxicity. With knowledge of the composition, mineralogical information and knowledge of corresponding toxicity of the various chemical species, the respective mixture rules in accordance with Regulation (EC) 1272/2008 are used to calculate the C&L of " Slags, precious metal refining ".

MeClas was used to automatically calculate the classification of the UVCB substance. The calculation tool is based on a database containing the human and environmental hazard information for each component relevant for classification. The information on the representative mineralogical composition (distribution pattern for each constituent of the UVCB substance) is incorporated into MeClas as well.


From the derived hazard category (output of MeClas) the corresponding human health (HH) toxicity value was deduced.


The following data were used as input of MeClas:


1. Classification from individual components according to Annex VI of the CLP regulation (Regulation (EC) 1272/2008) and the 2nd ATP to this regulation, unless additional information on self-classification was used.


2. Percentage of the components in the UVCB: individual total element concentrations (percentages based on total substance amount) were recalculated into percentage of the classified chemical species (i.e. substance), taking into account the distribution pattern of the respective element in its present various mineral forms if such information was available.

Applicant's summary and conclusion

Classification driver for STOT RE 1 are:
(i) Lead and lead compounds - oral (both grades)
According to the self-classification of lead compounds the specific concentration limits (SCL) for STOT RE classification are as follows:
STOT RE 1; H372: C ≥ 0.5%
STOT RE 2; H373: 0.05% ≤ C < 0.5%
(ii) Silica – crystalline respirable (position paper - inhalation (both grades)
STOT RE 1; H372: C ≥ 10%
STOT RE 2; H373: 1% ≤ C < 10%

(iii) Nickel oxide – 1stATP - inhalation (grade 1)

Classification of UVCB substances as being toxic to specific target organs after repeated dose application is based on the presence of a constituent ≥ 1 % classified as STOT-RE 1 and of a constituent ≥ 10 % classified as STOT-RE 2, respectively. However, for lead compounds there are specific concentration limits given for STOT RE classification assigned by the lead industry. According to Regulation (EC) 1272/2008 “specific concentration limits” should take precedence over any other concentration limits for the purpose of classification.

The classification driver for STOT RE classification of “Slags, precious metal refining” (composition profile 1 - composition profile 2) are lead and lead compounds (oral route) and crystalline, respirable silica (inhalation route) in concentration relevant for C&L as STOT RE 1. An additional driver is nickel oxide for grade 1. Therefore, “Slags, precious metal refining” meets classification criteria as STOT RE 1 and requires labelling with H372 (causes damage to organs).
Executive summary:

The described MeClas-based-calculation provides a conservative estimate of toxicological effects of "Slags, precious metal refining", derived on basis of the mixture C&L rules set forth in Regulation (EC) 1272/2008 using mineralogical information from a representative/worst case sample.