Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 205-439-3 | CAS number: 140-89-6
Bioaccumulation: terrestrial
Administrative data
Link to relevant study record(s)
Description of key information
This substance has a limited potential to bioaccumulate (based on log Kow used :, Log Kow estimated : 0.87 , and predicted bioconcentration factors, log BCF = 0.5 (EPIWIN/BCF Program).
The estimated BCF of 3.162 L/kg wet-wt was measured by calculation from EPI SuiteTM v4.1 Program.
These values would suggest very low bioaccumulation potential.
This is Exposure Assessment Tools and Models made from EPA (Environmental Protection Agency).
BCFBAF Program (v3.01) Results:
SMILES : CCOC(=S)[S-].[K+]
CHEM : Carbonodithioic acid, o-ethyl ester, potassium salt
MOL FOR: C3 H5 O1 S2 K1
MOL WT : 160.29
--------------------------------- BCFBAF v3.01 --------------------------------
Summary Results:
Log BCF (regression-based estimate): 0.50 (BCF = 3.16 L/kg wet-wt)
Biotransformation Half-Life (days) : 0.00429 (normalized to 10 g fish)
Log BAF (Arnot-Gobas upper trophic): -0.05 (BAF = 0.893 L/kg wet-wt)
Log Kow (estimated) : 0.87
Log Kow (experimental): not available from database
Log Kow used by BCF estimates: -2.24 (user entered)
Equation Used to Make BCF estimate:
Log BCF = 0.50
Correction(s): Value
Correction Factors Not Used for Log Kow < 1
Estimated Log BCF = 0.500 (BCF = 3.162 L/kg wet-wt)
Key value for chemical safety assessment
- BCF (terrestrial species):
- 3.162 L/kg ww
Additional information
According to “ANNEX IX- STANDARD INFORMATION REQUIREMENTS FOR SUBSTANCES MANUFACTURED OR IMPORTED IN QUANTITIES OF 100 TONNES OR MORE , a bioaccumulation study need not be conducted if:
— the substance has a low potential for bioaccumulation (for instance a log Kow ≤ 3) and/or a low potential to cross biological membranes, or
— direct and indirect exposure of the aquatic compartment is unlikely.
The estimated Log BCF of Potassium ethyl xanthate is 0.5 (BCF = 3.162 L/kg wet-wt)
This substance has a limited potential to bioaccumulate (based on log Kow used :, Log Kow estimated : 0.87 , and predicted bioconcentration factors, log BCF = 0.5 (EPIWIN/BCF Program).
The estimated BCF of 3.162 L/kg wet-wt was measured by calculation from EPI SuiteTM v4.1 Program.
These values would suggest very low bioaccumulation potential.
This is Exposure Assessment Tools and Models made from EPA (Environmental Protection Agency).
BCFBAF Program (v3.01) Results:
SMILES : CCOC(=S)[S-].[K+]
CHEM : Carbonodithioic acid, o-ethyl ester, potassium salt
MOL FOR: C3 H5 O1 S2 K1
MOL WT : 160.29
--------------------------------- BCFBAF v3.01 --------------------------------
Summary Results:
Log BCF (regression-based estimate): 0.50 (BCF = 3.16 L/kg wet-wt)
Biotransformation Half-Life (days) : 0.00429 (normalized to 10 g fish)
Log BAF (Arnot-Gobas upper trophic): -0.05 (BAF = 0.893 L/kg wet-wt)
Log Kow (estimated) : 0.87
Log Kow (experimental): not available from database
Log Kow used by BCF estimates: -2.24 (user entered)
Equation Used to Make BCF estimate:
Log BCF = 0.50
Correction(s): Value
Correction Factors Not Used for Log Kow < 1
Estimated Log BCF = 0.500 (BCF = 3.162 L/kg wet-wt)
===========================================================
Whole Body Primary Biotransformation Rate Estimate for Fish:
===========================================================
------+-----+--------------------------------------------+---------+---------
TYPE | NUM | LOG BIOTRANSFORMATION FRAGMENT DESCRIPTION | COEFF | VALUE
------+-----+--------------------------------------------+---------+---------
Frag | 1 | Methyl [-CH3] | 0.2451 | 0.2451
Frag | 1 | -CH2- [linear] | 0.0242 | 0.0242
L Kow| * | Log Kow = -2.24 (user-entered ) | 0.3073 | -0.6884
MolWt| * | Molecular Weight Parameter | | -0.4110
Const| * | Equation Constant | | -1.5058
============+============================================+=========+=========
RESULT | LOG Bio Half-Life (days) | | -2.3673
RESULT | Bio Half-Life (days) | |0.004293
NOTE | Bio Half-Life Normalized to 10 g fish at 15 deg C |
============+============================================+=========+=========
Biotransformation Rate Constant:
kM (Rate Constant): 125 /day (10 gram fish) **
kM (Rate Constant): 70.29 /day (100 gram fish) **
kM (Rate Constant): 39.53 /day (1 kg fish) **
kM (Rate Constant): 22.23 /day (10 kg fish) **
** Predicted value exceeds theoretical whole body maximum value.
kM (Rate Constant) of 125 /day is recommended/applied for 10 g fish
Arnot-Gobas BCF & BAF Methods (including biotransformation rate estimates):
Estimated Log BCF (upper trophic) = -0.049 (BCF = 0.8931 L/kg wet-wt)
Estimated Log BAF (upper trophic) = -0.049 (BAF = 0.8931 L/kg wet-wt)
Estimated Log BCF (mid trophic) = -0.031 (BCF = 0.9316 L/kg wet-wt)
Estimated Log BAF (mid trophic) = -0.031 (BAF = 0.9316 L/kg wet-wt)
Estimated Log BCF (lower trophic) = -0.027 (BCF = 0.9403 L/kg wet-wt)
Estimated Log BAF (lower trophic) = -0.027 (BAF = 0.9403 L/kg wet-wt)
Arnot-Gobas BCF & BAF Methods (assuming a biotransformation rate of zero):
Estimated Log BCF (upper trophic) = -0.049 (BCF = 0.8936 L/kg wet-wt)
Estimated Log BAF (upper trophic) = -0.049 (BAF = 0.8936 L/kg wet-wt)
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
