Page 74 - Demo

72
Chemicals
1-800-452-1261
2-Methyl-2-Propanol
see tert-Butyl Alcohol
Methyl Red
indicator, sodium salt pH 4.4 red to 6.2 yellow
C15H14N3O2Na F.W. 291.28
Methyl Salicylate
oil of wintergreen, synthetic laboratory grade
C8H8O3 F.W. 152.15
flinnsci.com
Storage: Organic #9
Disposal: #26a
Shelf Life: Indefinite
Soluble: Alcohol, ether, water, and acetic acid. Color of solution fades quickly because of reduction.
Color and Odor: Brown/orange, odorless solid. CAS No. 845-10-3
Methyl Red Indicator Solution
Methyl Sulfoxide
see Dimethyl Sulfoxide
Methyl Violet 2B
indicator
pH 0.1 yellow to 2.7 violet
C24H28ClN3 F.W. 393.94
0.02%, aqueous Storage: Organic #9
M0159* M0085 M0086
20 mL 100 mL 500 mL
$ 5.25 7.65 13.55
Disposal: #26b
Shelf Life: Fair to poor (color fades because of reduction). Color and Odor: Red, odorless liquid.
 HAZARD ALERT: Moderately toxic by ingestion; body tissue irri- tant. LD50 413 mg/kg.
Storage: Organic #9
Disposal: #26a
Shelf Life: Indefinite
Soluble: Water, chloroform; partially in alcohol and glycerin.
METHYL VIOLET 2B continued on next page.
*A special, unique dropping bottle package called a Flinn E-Z DropTM.
5-Methyl Resorcinol
see Orcinol
M0081
10 g
$10.75
 HAZARD ALERT: Moderately toxic by ingestion; severe body tissue irritant. LD50 887 mg/kg.
Storage: Organic #3 in a Flinn Chem-Saf TM Bag.
Disposal: #18b
Shelf Life: Indefinite if stored safely.
Soluble: Slightly in water, alcohol, acetic acid, and ether.
Color and Odor: Colorless or pale yellow/pale pink liquid with wintergreen odor.
CAS No. 119-36-8
M0119 M0063
100 mL 500 mL
$15.00 29.30
M0083 25 g
$16.90
For more than 40 years, Flinn Scientific has embraced the philoso- phy that chemicals can be safely used if the necessary safety precautions are thoroughly understood. Nevertheless, in July 2008, Illinois joined 15 other states that have banned the use of thermom- eters, barometers and other instruments containing mercury. At least 11 states also prohibit the use of elemental mercury in schools and hospitals. The laws limit the ability of manufacturers to sell mercury or mercury-added products. The purpose of laws banning the sale of mercury is to eliminate nonessential uses of mercury and reduce its environmental release. In response to these laws, Flinn Scientific has discontinued the sale of elemental mercury, mercury compounds and mercury thermometers.
Health and Environmental Effects of Mercury
Mercury is a volatile, highly toxic liquid and a serious environmen- tal hazard. The vapor pressure of mercury at room temperature is more than 100 times greater than the permissible exposure limit for mercury in air (0.01 mg/m3). The threat increases at higher tempera- tures. Exposure to mercury vapor occurs when mercury is spilled or products that contain mercury break. The high surface tension and low viscosity of liquid mercury are reflected in its common name, quicksilver. These properties cause mercury to break up into small droplets that are easily trapped or hidden. Small amounts of mercury are easy to overlook and add up over time. There have been reports of 15–20 pounds of spilled mercury found in labs! Inhalation and absorption of mercury leads to nervousness, insomnia, depression, headache, fatigue, tremors, muscle atrophy and cognitive decline. Mercury is a cumulative poison—it is distributed in the blood within hours of exposure to mercury vapor and is concentrated in the kidneys. Higher exposures lead to kidney damage and respira- tory failure. Mercury and mercury compounds do not biodegrade. Microorganisms in soil and water convert mercury to methyl- and dimethylmercury, which are more toxic than elemental mercury and bioacummulate in the food chain.
Cleaning Up Mercury Spills
• Ifmercuryisspilledorathermometerbreaks,immediatelyopen the windows and doors to provide maximum ventilation.
• Donotuseavacuumcleanerorabroomtocleanupaspill.The vacuum will disperse mercury into the air, and a broom will break the mercury into smaller droplets and spread them.
• Avoid contaminating shoes or other items in the area of the spill. Put plastic bags over your shoes.
• Wear chemical-resistant gloves. Collect visible drops of mercury with a medicine dropper or Beral-type pipet. Transfer the mercury to a seamless polyethylene bag or bottle.
• Mercurydropletswillclingtoverticalsurfacesandontheunder- side of bench tops or shelves. Use a flashlight to locate small beads of mercury on surfaces or in cracks and crevices.
• Lightlycovertheareawithzincpowder;theresultingzincamal- gam is easily collected. (Do not use sulfur—it forms a surface film and leaves the mercury underneath exposed.)
• The Mercon® Mercury Spill Control Kit is an effective mercury suppressant and decontaminant. It contains a spray to suppress mercury vapor, a sponge to pick up mercury droplets, chemical wipes to decontaminate the spill site and a waste container. See page 146 for a detailed explanation.
• Broken mercury thermometers in an oven can flood the lab with dangerous mercury vapor. Immediately open all windows and place the appliance in the hood or take it outside to drive off residual mercury.
Replacing Mercury Thermometers
See flinnsci.com for a complete listing of our digital and spirit-filled thermometers to meet all of your lab needs!
Mercury and Mercury Spills