PBT borderline chemicals under REACH

Environmental Sciences Europe

Table 1 Thirteen substances in the publicly available REACH database 2012

	CAS	Name	LogK_OW	LogK_AW	vPvB/PB classification	LRTP according to				T classification	CDSL
						t_1/2(air)> 2 days	ELPOS	Brown and Wania[8]	Muir and Howard[9]
(b)	13014-24-9	1,2-Dichloro-4-(trichloromethyl)benzene	5.18	-2.23	vPB	x	x			¬T
(c)	5216-25-1	α,α,α,4-Tetrachlorotoluene	4.54	-2.10	vP¬B	x	x	x		T
(c)	2136-89-2	α,α,α,2-Tetrachlorotoluene	4.54	-2.10	vP¬B	x	x			T
(c)	87-61-6	1,2,3-Trichlorobenzene	3.93	-1.01	vP¬B	x	x	x		T	x
	120-82-1	1,2,4-Trichlorobenzene	3.93	-1.01	vP¬B	x	x	x		T	x
	102-36-3	3,4-Dichlorophenyl isocyanate	3.88	-2.28	vP¬B	x	x	x		T
	307-35-7	Heptadecafluorooctane-sulphonyl fluoride	9.62	3.44	vP¬B	x	x	x		T
	117-08-8	4,5,6,7-Tetrachloro-1,3-isobenzofurandione	4.65	-4.10	vP¬B	x	x	x	x	¬T	x
	108-77-0	2,4,6-Trichloro-1,3,5-triazine	1.73	-4.66	vP¬B	x	x	x		¬T	x
	2402-79-1	2,3,5,6-Tetrachloropyridine	3.38	-0.46	vP¬B	x	x	x		¬T
	34893-92-0	1,3-Dichloro-5-isocyanatobenzene	3.88	-2.28	vP¬B	x	x	x		¬T
	98-56-6	4-Chloro-α,α,α-trifluorotoluene	3.6	0.15	vP¬B	x	x	x		?
	29091-09-6	2,4-Dichloro-1,3-dinitro-5-(trifluoromethyl)benzene	3.88	-4.79	vP¬B	x	x	x		?

The substances either are borderline chemicals (italics), for which one of the criteria for a SVHC is failed by not more than 10% but which are prone to long-range transport, or fulfil at least three of the screening criteria indicating LRTP (half-life criterion t_1/2(air) > 2 days, multimedia model ELPOS, chemical profile of known Arctic contaminants according to Brown and Wania [8], or combination of the half-life criterion with the log K_AW condition defined by Muir and Howard [9], log K_AW ≥ 5 and ≤1) and fail one criterion to be accounted for a SVHC by more than 10% (extended borderline).