Page 81 - Demo

“Your Safer Source for Science”
PALMITIC ACID continued
Storage: Organic #1
Disposal: #26a
Shelf Life: Indefinite
Soluble: Hot alcohol; not water.
Color and Odor: White solid with waxlike odor. CAS No. 57-10-3
Technical Note: Melting point 61–64 °C. Pancreatin
Storage: Organic #2
Disposal: #26a
Shelf Life: Good, but only if kept refrigerated. Soluble: Partially in water; not in alcohol.
Color and Odor: Off-white solid with sour malt odor. CAS No. 8049-47-6
Papain
Storage: Organic #2
Disposal: #26a
Shelf Life: Fair; store cold.
Soluble: Partially soluble in water and glycerol.
Color and Odor: Grayish-white solid with papaya odor. CAS No. 9001-73-4
Save On HazMat Fees
79
Pentane
laboratory grade
CH3(CH2)3CH3 F.W. 72.15
P0213
100 mL
$9.60
enzyme
laboratory grade, powder
P0002
100 g
$13.50
methyl propyl ketone reagent grade, >98%
CH3COCH2CH2CH3 F.W. 86.13
P0289
25 mL
$9.20
proteolytic enzyme
P0260
10 g
$23.10
We Didn’t Know About It Yesterday!
We have added the hazard alert about the peroxidizable character of some alcohols, such as 2-octanol, to our chemical listings. This development may not be new; however, one of the many benefits of the Flinn Scientific Catalog/Reference Manual is that it keeps faculty up-to-date. What does your low-bid chemical supplier do to help you?
diethyl ketone reagent grade, 99%
CH3CH2COCH2CH3 F.W. 86.13
P0290
25 mL
$9.65
para-Dichlorobenzene
see page 375
Paraffin Oil
see Mineral Oil
Paraffin, Wax
Storage: Organic #3
Disposal: #26a
Shelf Life: Indefinite
Soluble: Warm alcohol, chloroform, petroleum ether, olive oil, and other organic solvents.
Color and Odor: Waxy white, odorless solid. CAS No. 8002-74-2
Pectinase
Storage: Organic #2
Disposal: #26a
Shelf Life: Indefinite, when refrigerated; hygroscopic. Soluble: Water
Color and Odor: Light tan solid with strong, sweet odor. CAS No. 9032-75-1
 HAZARD ALERT: Flammable liquid; narcotic in high concentra- tions. Toxic by ingestion and inhalation. LD50 400 mg/kg. TLV 1770 mg/m3.
Storage: Organic #3 in an approved flammables cabinet.
Disposal: #18b
Shelf Life: Indefinite
Soluble: Miscible with alcohol and many other organic solvents. Color and Odor: Colorless liquid with a gasoline odor.
CAS No. 109-66-0
1-Pentanol
see n-Amyl Alcohol
2-Pentanone
 HAZARD ALERT: Dangerous fire risk; highly flammable liquid and vapor. Causes serious eye and respiratory tract irritation; slightly toxic by ingestion. Use only in a hood or well-ventilated area. LD50 1600 mg/kg. PEL 200 ppm.
Storage: Organic #4 in a dedicated flammables cabinet. If one is not available, store in a Flinn Saf-StorTM Can.
Disposal: #18b
Shelf Life: Fair; volatile liquid. Store in a cool, dry place.
Soluble: Miscible with alcohol and ether; slightly soluble in water. Color and Odor: Colorless liquid with fruity, acetone-like odor. CAS No. 107-87-9
Technical Note: Reacts with hydrogen peroxide and nitric acid to form explosive peroxides.
3-Pentanone
 HAZARD ALERT: Dangerous fire risk; highly flammable liquid and vapor. Respiratory tract irritant; narcotic at high concentrations; may cause drowsiness or dizziness. Use only in a hood or well-ventilated area. LD50 2140 mg/kg. TLV 200 ppm.
Storage: Organic #4 in a dedicated flammables cabinet. If one is not available, store in a Flinn Saf-StorTM Can.
Disposal: #18b
Shelf Life: Fair; volatile liquid. Store in a cool, dry place.
Soluble: Miscible with alcohol and ether; slightly soluble in water. Color and Odor: Colorless liquid with acetone-like odor.
CAS No. 96-22-0
Technical Note: Reacts with hydrogen peroxide and nitric acid to form explosive peroxides.
Pentyl Alcohol
see n-Amyl Alcohol
laboratory grade
P0003
1 lb
$9.55
enzyme
powder obtained from Aspergillus niger
P0285
5g
$41.05
No Food in the Laboratory
There may be many food-grade items among the laboratory chemicals on the shelves in the chemical storeroom. Sugar, corn syrup and lemon juice are just a few examples. Each time one of these substances is used in the laboratory, take that occasion to reinforce the fact that in the lab setting, it is a chemical. Food is never consumed in a laboratory. Is it time to say good-bye to the coffee pot in the lab? You set the example!