Tetra  [  c  ]	Nummer
Tetra-cain	14 / stark 18
Tetra-carbonyl-nickel	14 / 12 / 18 / 19 / 19b / # (19a) / # 21 Haut
2,3,4,5-  /  2,3,5,6-    Tetra-chlor-anilin	11 / 13 / 18 / 19
5,6,12,13-Tetra-chlor-anthra-( 2,1,9-def  :  6,5,10 - d’e’f’ ) -di-iso-chinolin-1,3,8,10-(2H,9H)-tetron	16 / # (19b)
Tetra-chlor-p-benzochinon	14 / 19
1,2,3,4-  /  1,2,3,5-    Tetra-chlor-benzol	3 / 16 / 19
1,2,4,5-Tetra-chlor-benzol	10 / 3
2,3,4,5-Tetra-chlor-benzoyl-chlorid	2 / 18
2,2’,5,5’-Tetra-chlor-biphenyl	14 / 19 / 19b / # (19a) / # 21 Haut
meso-1,2,3,4-Tetra-chlor-butan	14
Tetra-chlor-cyclo-propen	16
2,3,7,8-Tetra-chlor-di-benzo-p-dioxin	14 / 9 / 18 / 19 / 19a / Über MAK 19b / # 21 Haut
2,3,7,8-Tetra-chlor-di-benzofuran	14 / 18 / 19 / 19a
1,1,1,2-Tetra-chlor-2,2-di-fluorethan	16
1,1,2,2-Tetra-chlor-1,2-di-fluorethan
4,4,5,5-Tetra-chlor-1,3-dioxolan-2-on	14
2,4,4’,5-Tetra-chlor-di-phenyl-sulfid	14 / 19
2,4,4’,5-Tetra-chlor-di-phenyl-sulfon
1,1,1,2-Tetra-chlor-ethan	14 / 10 / # (19a)
1,1,2,2-Tetra-chlor-ethan	14 / 10 / 9 / # (19a+c) / # 21 Haut
Tetra-chlor-ethen	14 / 10 / 19 / # (19a+b) / # 21 Haut
(1,2,2,2-Tetra-chlor-ethyl)-butyrat	16
Tetra-chlor-ethylen	14 / 10 / 19 / # (19a+b) / # 21 Haut
Tetra-chlor-gold-(III)-säure Trihydrat	2 / 12 / 18
Tetra-chlor-hydrochinon	16 / 13
Tetra-chlor-iso-phthalsäure-di-nitril	7 / 16 / 18 / # (19a) / # 6 Augen
Tetra-chlor-kohlenstoff	10 / 9 / # (19a+b) / # 21 Haut
Tetra-chlor-methan
2,3,5,6-Tetra-chlor-4-(methyl-sulfonyl)-pyridin	xxx
Tetra-chlor-naphthalin	14 / # 21 Haut
1,2,4,5-Tetra-chlor-3-nitro-benzol	3 / 16 / 18
Tetra-chloro-platinate	12 / 18 / # 6 Augen
2,3,4,5-Tetra-chlor-phenol	3 / 16 / 19
2,3,4,6-Tetra-chlor-phenol	14 / 3 / 16 / 19 / # 21 Haut
2,3,5,6-Tetra-chlor-phenol	14 / 10 / 18 / 19
Tetra-chlor-phenole	xxx
Tetra-chlor-phthalsäure-anhydrid	2 / 18 / # 6 Augen
2,3,5,6-Tetra-chlor-pyridyl-4-methylsulfon	16 / 18
2,4,5,6-Tetra-chlor-pyrimidin	16 / # 40 Tränen
Tetra-chlor-salicyl-anilide	16 / # 42 Photo
Tetra-chlor-silan	11 / # 40 Tränen
Tetra-chlor-terephthalo-nitril	16 / 18
Tetra-chlor-tetra-fluorpropan	11
Tetra-chlor-thiophen	11 / 16
α,α,α,4-Tetra-chlor-toluol	16 / 19 / 19a+b / # 21 Haut
Tetra-chlor-vinphos	4 / # (19a)
α,α,α’,α’-Tetra-chlor-o-xylol	2 / # 40 Tränen
Tetra-cosan, verzweigt, Isomerengemisch	16
Tetra-cosansäure
1,2,4,5-Tetra-cyano-benzol	14
7,7,8,8-Tetra-cyano-chinon-di-methan
Tetra-cyano-ethylen
Tetra-cyano-ethylenoxid	16
Tetra-cyclin	14 / selten 18
Tetra-cyclin Hydrochlorid	14 / 18
Tetra-cyclo-hexyl-stannan	12 / 18 / # 21 Haut