Dangerous for the environment

CsH₂AsO₄

MnS

Hg(CH₃COO)₂

HgBr₂

Hg₂(NO₃)₂ · 2H₂O

HgO

HgO

CH₃(CH₂)₁₅N⁺(Br^-)(CH₃)₃

NaNO₂

KNO₂

Pr₂(SeO₄)₃ • 5H₂O

Pb(CH₃COO)₂ • 3H₂O

ClCH₂COOH

Yb₂(SeO₄)₃ • 8H₂O

(NH₄)₂Ni(SO₄)₂ • 6H₂O

ZnCrO₄ · Zn(OH)₂ · H₂O

(BiO)₂CrO₄

CuCl₂ · 2H₂O

MnSO₄ · 5H₂O

C₆H₄(OH)₂

C₁₀H₁₄O

(CH₃)₂CHC₆H₃(CH₃)OH

C₉H₇NO

Ce(NO₃)₃ • 6H₂O

SnCl₂ · 2H₂O

Co₃[OOCC(OH)(CH₂COO)₂]₂ • 10H₂O

Co₅H₈[B(W₂O₇)₆]₂ • nH₂O

Co(SCN)₂

Co(VO₃)₂ • nH₂O

C₁₅H₁₂Br₂O

C₁₈H₁₄

C₁₃H₈O

C₁₃H₁₀

CHI₃

[(C₂H₅)₂NCS₂]₂Zn

CoO

Cd(VO₃)₂

C₄H₄O₆Pb

PbO

NH₂C(=NH)NH₂ · ½H₂CrO₄

Pb

SbCl₅

C₁₄H₁₀

C₁₄H₁₀

H₅IO₆

NaHSeO₃

CdC₂O₄

C₆H₄Br₂

Pb(CH₃COO)₂ • 3H₂O

C₁₄H₈O₄

(C₆H₅)₂NH