Page 28 - Demo

Chemicals
Buffer Capsules
pH accuracy ±0.02 at 25 °C.
stable dry powder in capsules
quickly and completely soluble
each capsule makes 100 mL of buffer solution 10 capsules per vial
1-800-452-1261
26
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Buffer Capsules
B0227 contains 11 capsules, one of each
pH value, and is great for preparing solutions of pH 2–12 for pH indicators.
Catalog No.
pH Value
Price/Vial
B0101
2.00
$10.40
B0102
3.00
10.40
B0103
4.00
10.40
B0104
5.00
10.40
B0105
6.00
10.40
B0106
7.00
10.40
B0107
8.00
10.40
B0108
9.00
10.40
B0109
10.00
10.40
B0110
11.00
10.40
B0111
12.00
10.40
B0227*
2.00–12.00
16.55
*This special package contains 11 capsules, one of each pH value.  HAZARD ALERT: Low and high pH buffer solutions should be
treated as strongly acidic and alkaline solutions, respectively. Storage: Wherever convenient—no special storage requirements. Disposal: #26a
Shelf Life: Indefinite; consume minimal shelf space and are very stable.
Buffer Envelopes
Chemvelopes®
each envelope makes 500 mL of buffer solution 5 envelopes of a single pH per carton
pH accuracy ±0.02 at 25 °C
BUFFER ENVELOPES continued
envelope makes 500 mL when added to distilled water. Included in the package is a 7-mL dispensing vial of a buffer preservative. The preservative contains an effective antifungal, antibacterial agent. In addition, the preservative is a universal indicator that tints neutral solutions green, acid solutions orange-red, and basic solutions blue.
Buffer Solution Preservative
Colorless B0175 60 mL $17.05 Indicating B0176 60 mL 19.10
Technical Note: Buffer solutions, particularly basic pH buffers, tend to act as a media for fungus and bacteria growth. This buffer preser- vative contains a highly effective anti-fungal, anti-bacterial agent to provide long-term protection for buffer solutions and does not affect pH value. The preservative is available in two forms:
• Preservative only (colorless) (B0175)
• Preservative with indicator (B0176)
If the preservative with indicator is used, the buffer will be tinted green for neutral solutions, orange-red for acid solutions and blue for basic solutions. Please specify whether you want clear, non- indicating preservative or the preservative with indicator. Three drops of preservative provides ample protection and, in the case of the indicating preservative, a distinct tint for 100 mL of buffer solution.
Catalog No.
pH Value
Price/Carton
B0112
2.00
$16.45
B0113
3.00
16.45
B0114
4.00
16.40
B0115
5.00
16.45
B0116
6.00
16.45
B0117
7.00
16.45
B0118
8.00
16.45
B0119
9.00
16.45
B0120
10.00
16.45
B0121
11.00
16.45
B0122
12.00
16.45
B0123*
2.00–11.00
33.20
*This special package contains 10 envelopes, one envelope of each pH value from 2 to 11.
 HAZARD ALERT: Low and high pH buffer solutions should be treated as strongly acidic and alkaline solutions, respectively. Storage: Wherever convenient—no special storage requirements. Shelf Life: Excellent; very stable and convenient to store. Technical Note: Aluminum foil, polyethylene, and paper protec- tive envelopes. Envelopes keep buffers dry and free-flowing. Each
Continued on next column.
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Burner Fuel
see Ethyl Alcohol (burner fuel)
Butanoic Acid
see Butyric Acid
2-Butanone
see Methyl Ethyl Ketone
n-Butyl Alcohol
1-butanol
reagent CH3(CH2)2CH2OH F.W. 74.12
B0177 100 mL
B0032 500 mL
B0033 4 liters
$ 8.25 12.45 58.05
Buffer Solution, Electrophoresis
 HAZARD ALERT: Moderate fire risk; moderately toxic by inhala- tion and ingestion; eye irritant; absorbed by skin. LD50 790 mg/kg. TLV 152 mg/m3.
Storage: Organic #2 in a dedicated flammables cabinet; if one is not available, store in a Flinn Saf-Stor TM Can.
Disposal: #18b. U-Listed (U031); purchase small amounts for effec- tive inventory control.
Shelf Life: Fair; substance may oxidize.
Soluble: Miscible with alcohol and ether; soluble with water. Color and Odor: Colorless liquid with strong wine odor.
CAS No. 71-36-3
sec-Butyl Alcohol
2-butanol laboratory grade CH3CHOHCH2CH3 F.W. 74.12
Wear Your Goggles!
How many times a year do you say this? Having a firm goggle policy and taking a proactive disciplinary stance when the policy is violated will force students to wear their goggles. One idea for enforcing goggle policy is to write safety violations every time students are caught not wearing their goggles. Three violations and students must retake a safety exam before they are allowed back into lab. Firm policies are easy to follow and enforce and will make your lab safer.
B0034 500 mL
sec-BUTYL ALCOHOL continued on next page.
$15.35