| Index of target gases/substances : B |  |
| Gas
or Vapour to be Measured Chemical Formula |
Gastec
Tube No. & Name |
Measuring Range (ppm) |
No.of Pump Strokes |
Shelf Life (year) |
Note | TLV- TWA,C (ACGIH) (ppm) |
|
| Benzaldehyde C6H5CHO |
91L | Formaldehyde | 4-92 | 1 | 3* | T | - |
| Benzene C6H6 |
121 | Benzene | 60-120 | 1 | 3 | - | 0.5 |
| 5-60 | 2 | ||||||
| 2.5-5 | 4 | ||||||
| 121L | Benzene | 10-65 | 1 | 3 | + | ||
| 0.1-10 | 5 | ||||||
| 121S | Benzene | 120-312 | 1 | 3 | + | ||
| 5-120 | 2 | ||||||
| 2-5 | 4 | ||||||
| 121SL | Benzene | 20-100 | 1 | 3 | + | ||
| 1-20 | 5 | ||||||
| 121SP | Benzene | 20-66 | 1 | 2 | + | ||
| 0.2-20 | 3 | ||||||
| 171 | Acetylene | 0.03-0.6% | 4 | 3 | T | ||
| Benzyl bromide C6H5CH2Br |
136L | Methyl bromide | 25-850 | 1 | 2 | + | - |
| Benzyl chloride C6H5CH2Cl |
132L | Trichloroethylene | 1.6-20 | 2 | 2* | T | 1 |
| Boron trichloride BCl3 |
12L | Hydrogen cyanide | 0.5-20 | 2 | 2 | H | - |
| Bromine Br2 |
8La | Chlorine | 0.05-0.8 | 4 | 3 | - | 0.1 |
| Bromochloromethane | See Chlorobromomethane | ||||||
| Bromoform CH3(CH2)2CH3 |
136L | Methyl bromide | 1-50 | 1 | 2 | + | 0.5 |
| 1,3-Butadiene CH2:CHCH:CH2 |
174 | 1,3-Butadiene | 50-800 | 1 | 3 | T | 2 |
| 174L | 1,3-Butadiene | 5-100 | 4 | 3 | - | ||
| 2.5-5 | 8 | ||||||
| 174LL | 1,3-Butadiene | 0.5-5 | 1 | 3* | - | ||
| Butane CH3(CH2)2CH3 |
104 | Butane | 25-1400 | 1 | 3 | - | 800 |
| 103 | Hydrocarbons (Lower Class) |
0.84-1.68% | 1/2 | 2* | ++ | ||
| 0.07-0.84% | 1 | ||||||
| 0.035-0.07% | 2 | ||||||
| 1-Butanol CH3CH2CH2CH2OH |
114 | 1-Butanol | 10-150 | 3 | 3 | T | C 50 |
| 2-Butanol CH3CH2CH(OH)CH3 |
115 | 2-Butanol | 5-150 | 3 | 3 | T | 100 |
| 2-Butanone | See Methyl ethyl ketone(MEK) | ||||||
| Butyl acetate CH3CO2(CH2)3CH3 |
142 | Butyl acetate | 0.05-0.8% | 2 | 3 | T | 150 |
| 142L | Butyl acetate | 10-300 | 2 | 2 | T | - | |
| tert-Butanol (CH3)3COH |
102L | n-Hexane | 0.05-1.2% | 2 | 3 | - | 100 |
| Butyl acrylate CH2:CHCO2C4H9 |
142L | Butyl acetate | 7-210 | 2 | 2 | T | 2 |
| Butyl amine CH3(CH2)3NH2 |
180 | Amines | 8-160 | 1 | 3 | T | C5 |
| 180L | Amines | 0.55-11 | 1 | 2 | T | ||
| tert-Butylamine (CH3)3CNH2 |
180 | Amines | 5.5-110 | 1 | 3 | T | |
| n-Butyl bromide C4H9Br |
136H | Methyl bromide | 24-360 | 1 | 3 | + | |
| 136L | Methyl bromide | 10-100 | 1 | 2 | + | ||
| 136LA | Methyl bromide | 2.4-43.2 | 1 | 2 | + | ||
| 1-18 | 2 | ||||||
| Butyl mercaptan CH3(CH2)3SH |
70L | Mercaptans | 6.4-12.8 | 1/2 | 2 | - | 0.5 |
| 0.8-6.4 | 1 | ||||||
| 0.32-0.8 | 2 | ||||||
| 0.16-0.8 | 4 | ||||||
| tert-Butyl mercaptan (CH3)3CSH |
75 | tert-Butyl mercaptan | 60-150mg/m3 | 1/2 | 2 | T | - |
| 30-60mg/m3 | 1 | ||||||
| 2.5-30mg/m3 | 2 | ||||||
| 75L | tert-Butyl mercaptan | 15-30mg/m3 | 1/2 | 2* | T | ||
| 1-15mg/m3 | 1 | ||||||
| 0.5-1mg/m3 | 2 | ||||||
| 77 | TBM&DMS | 1-15 mg/L | 1 | 2* | +T | ||
| 70L | Mercaptans | 4-8 | 1/2 | 2 | - | ||
| 0.5-4 | 1 | ||||||
| 0.2-0.5 | 2 | ||||||
| 0.1-0.5 | 4 | ||||||
| Butyric acid CH3CH2CH2CO2H |
81L | Acetic acid | 0.325-13 | 1 | 2* | T | - |
| Butyronitrile CH3CH2CH2CN |
191L | Acrylonitrile | 6-180 | 1 | 3 | + | - |
| T:Temp Correction | H:Humidity Correction | *:Refrigerator Store | Mesh:Correction Factor/Chart |