R 325.60160 Maximum allowable concentrations for substances; Q to Z.

Rule 10. Table 6 for substances Q to Z, are as follows: TABLE 6 MAXIMUM ALLOWABLE CONCENTRATIONS FOR SUBSTANCES; Q TO Z SUBSTANCE CAS No.1 MAC/Ceiling/STEL ppm mg/m3 Quinone 106-51-4 0.1 0.4 S RDX 121-82-4 --- 1.5 Rhodium metal fume, dusts, and insoluble compounds (as Rh) 7440-16-6 --- 0.1 soluble compounds (as Rh) --- 0.001 Ronnel 299-84-3 --- 10 Rotenone (commercial) 83-79-4 --- 5 Rouge Inert dust Selenium compounds (as Se) 7782-49-2 --- 0.2 Selenium hexafluoride 7783-79-1 0.05 0.4 Silica, crystalline, respirable dust** See OH 690 Silica in Construction Cristobalite 14464-46-1 Quartz 14808-60-7 Tripoli ( as quartz) 1317-95-9 Trydimite 15468-32-3 Silicon carbide 409-21-2 Inert dust Silver, metal and soluble compounds 7440-22-4 --- 0.01 S Sodium fluoroacetate (1080) 62-74-8 --- 0.05 Sodium hydroxide 1310-73-2 --- 2 Starch 9005-25-8 Inert dust Stibine 7803-52-3 0.1 0.5 Stoddard solvent 8052-41-3 200 1,150 Strychnine 57-24-9 --- 0.15 C Styrene monomer (phenylethylene) 100-42-5 100 420 Sucrose 57-50-1 Inert dust Sulfur dioxide 7446-09-5 5 13 Sulfur hexafluoride 2551-62-4 1,000 6,000 Sulfuric acid 7664-93-9 --- 1 TABLE 6 MAXIMUM ALLOWABLE CONCENTRATIONS FOR SUBSTANCES; Q TO Z SUBSTANCE CAS No.1 MAC/Ceiling/STEL ppm mg/m3 Sulfur monochloride 10025-67-9 1 6 Sulfur pentafluoride 5714-22-7 0.025 0.25 Sulfuryl fluoride 2699-79-8 5 20 Systox See Demeton® 2,4,5T 93-76-5 --- 10 Tantalum 7440-25-7 --- 5 S TEDP 3689-24-5 --- 0.2 Teflon® decomposition products (maintain minimal air concentration) Tellurium 13494-80-9 --- 0.1 Tellurium hexafluoride 7783-80-4 0.02 0.2 S TEPP 107-49-3 --- 0.05 C Terphenyls 26140-60-3 1 9 1,1,1,2-Tetrachloro-2,2-difluoroethane 76-11-9 500 4,170 1,1,2,2-Tetrachloro-1,2-difluoroethane 76-12-0 500 4,170 S 1,1,2,2-Tetrachloroethane 79-34-5 5 35 Tetrachloroethylene See Perchloroethylene Tetrachloromethane See Carbon tetrachloride S Tetrachloronaphthalene 1335-88-2 --- 2 S Tetraethyl lead (as Pb) 78-00-2 --- 0.075a Tetrahydrofuran 109-99-9 200 590 S Tetramethyl lead (TML)(as Pb) 75-74-1 --- 0.150 S Tetramethyl succinonitrile 3333-52-6 0.5 3 Tetranitromethane 509-14-8 1 8 S Tetryl (2,4,6-trinitrophenylmethyl-nitramine) 479-45-8 --- 1.5 S Thallium, soluble compounds (as Tl) 7440-28-0 --- 0.1 Thiram 137-26-8 --- 5 Tin Inorganic compounds, except SnH4 and SnO2 7440-31-5 --- 2 Organic compounds 7440-31-5 --- 0.1 Oxide 21651-19-4 Inert particulate TABLE 6 MAXIMUM ALLOWABLE CONCENTRATIONS FOR SUBSTANCES; Q TO Z SUBSTANCE CAS No.1 MAC/Ceiling/STEL ppm mg/m3 Titanium dioxide 13463-67-7 Inert particulate Toluene (toluol) 108-88-3 200 750 C Toluene-2,4-diisocyanate 584-84-9 0.02 0.14 S o-Toluidine 95-53-4 5 22 Toxaphene See Chlorinated camphene Tributyl phosphate 126-73-8 --- 5 1,1,1-Trichloroethane See Methyl chloroform S 1,1,2-Trichloroethane 79-00-5 10 45 Trichloroethylene 79-01-6 100 535 Trichloromethane See Chloroform S Trichloronaphthalene 1321-65-9 --- 5 1,2,3-Trichloropropane 96-18-4 50 300 1,1,2-Trichloro-1,2,2-trifluoroethane 76-13-1 1,000 7,600 Triethylamine 121-44-8 25 100 Trifluoromonobromomethane 75-63-8 1,000 6,100 Trimethyl benzene 25551-13-7 25 120 2,4,6-Trinitrophenol See Picric acid 2,4,6-Trinitrophenylmethylnitramine See Tetryl S Trinitrotoluene 118-96-7 --- 1.5 Triorthocresyl phosphate 78-30-8 --- 0.1 Triphenyl phosphate 115-86-6 --- 3 Tungsten and compounds (as W) Insoluble 7440-33-7 --- 5 Soluble --- 1 Turpentine 8006-64-2 100 560 Uranium (natural) soluble and insoluble compounds (as U) 7440-61-1 --- 0.2 C Vanadium (V2O5 dust) 1314-62-1 --- 0.5 (V2O5 fume) --- 0.1 Vinyl benzene See Styrene TABLE 6 MAXIMUM ALLOWABLE CONCENTRATIONS FOR SUBSTANCES; Q TO Z SUBSTANCE CAS No.1 MAC/Ceiling/STEL ppm mg/m3 C Vinyl chloride See GI 302. Vinyl Chloride* Vinyl cyanide See Acrylonitrile Vinyl toluene 25013-15-4 100 480 Warfarin 81-81-2 --- 0.1 Xylene (xylol) 1330-20-7 100 435 S Xylidine 1300-73-8 5 25 Yttrium 7440-65-5 --- 1 Zinc chloride fume 7646-85-7 --- 1 Zinc oxide fume 1314-13-2 --- 5 Zirconium compounds (as Zr) 7440-67-7 --- 5 1 The CAS number is for information only. Enforcement is based on the substance name. For an entry covering more than 1 metal compound measured as the metal, the CAS number for the metal is given - not the CAS number for the individual compounds. A See R 325.60154(2)(a). C See R 325.60154(2)(b). S See R 325.60154(2)(c). STEL See R 325.60154(2)(d) a The 1970 ACGIH standard for Tetraethyl lead is 0.100 mg/m3. * Caution--these rules contain extensive requirements for exposure to these substances. ** See Table 7 for the exposure limit for any operations or sectors where the exposure limit in OH 690. “Silica in Construction” is stayed or is otherwise not in effect. All MIOSHA Standards shown in this table are referenced in R 325.60151.