. 2020 Sep 14;268:115642. doi: 10.1016/j.envpol.2020.115642

Table 1.

Structures and molecular information of major cannabinoids and metabolites.

Name	Δ⁹-tetrahydrocannabinol	11-hydroxy-Δ⁹-tetrahydrocannabinol	11-nor-9-carboxy- Δ⁹-tetrahydrocannabinol	Cannabidiol	Cannabinol
Abbreviation	THC	THC-OH	THC-COOH	CBD	CBN
Molecular formula	C₂₁H₃₀O₂	C₂₁H₃₀O₃	C₂₁H₂₈O₄	C₂₁H₃₀O₂	C₂₁H₂₆O₂
Molar mass (g mol⁻¹)	314	330	344	314	310
Pka	9.81^a	9.78 ± 0.60^b	4.87/9.30^a	6.43^a
	9.81 ± 0.60^b		4.66 ± 0.40^b
Log K_ow	7.68^a	5.36 ± 0.42^b	6.21	7.03^a
	6.84 ± 0.35^b		5.25 ± 0.38^b
Aqueous solubility (mg L⁻¹)	0.040^a	7.931^b	0.230^a	0.006^a
	0.786^b		309^b
Structure