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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Bioaccumulation: terrestrial

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
bioaccumulation: terrestrial
Data waiving:
other justification
Justification for data waiving:
other:

Description of key information

This substance has a limited potential to bioaccumulate (based on log Kow  used by BCF estimates:  1.28, and predicted bioconcentration factors, log BCF = 0.51   (EPIWIN/BCF Program).
The estimated BCF of 3.27 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:
==============================
CAS Number: 140-93-2
SMILES : CC(C)OC(=S)S([Na])
CHEM   : Carbonodithioic acid, o-(1-methylethyl) ester, sodium salt
MOL FOR: C4 H7 O1 S2 Na1 
MOL WT : 158.21
--------------------------------- BCFBAF v3.01 --------------------------------
  Summary Results:
  Log BCF (regression-based estimate):  0.51  (BCF = 3.27 L/kg wet-wt)
  Biotransformation Half-Life (days) :  0.0564  (normalized to 10 g fish)
  Log BAF (Arnot-Gobas upper trophic):  0.35  (BAF = 2.24 L/kg wet-wt)
 
Log Kow (experimental):  not available from database
Log Kow used by BCF estimates:  1.28
 
Equation Used to Make BCF estimate:
   Log BCF = 0.6598 log Kow - 0.333 + Correction
 
      Correction(s):                    Value
       No Applicable Correction Factors
 
   Estimated Log BCF =  0.515  (BCF = 3.272 L/kg wet-wt)

Key value for chemical safety assessment

BCF (terrestrial species):
3.27 L/kg ww

Additional information

It is not expected that the xanthates to bio-accumulate in the food chain because of much lower values of BCF and BAF than REACH and US EPA criteria.


Bioaccumulation of xanthates in most organisms is limited by the metabolism and rapid excretion of carbon disulfide. Bioaccumulation in the food chain is predicted to be low(Office of Pollution and Toxics, U.S. EPA , August 1994, EPA 749-F-94-008a)