Chem 1lc Safety 2021

1. Safety

2. Hazard

3. Risk

4. Exposure

1. freedom from danger, injury, or damage

2. potential source of danger or harm

3. probability of suffering harm because of exposure

4. coming in contact with a hazard

Which type of eye protection provides the best protection against a chemical splash?

Chemical splash safety goggles

R

A

M

P

1. Recognize the hazard of acid to the eyes

2. Assess procedure, their knowledge, & exposure probability

3. Minimize risk of exposure by wearing goggles

4. Prepare for emergencies by locating eye wash

Corrosive

destroys living tissue on contact

symbol: beaker pouring in hand causing destruction

flammable

easily ignites and burns rapidly

symbol: fire sign

irritant

irritates living tissue on contact

symbol: exclamation mark

oxidizer

rapidly oxidizes, can result in combustion

symbol: circle with flame on top

poison

may be fatal to humans and animals

fatal symbol; skull

sensitizer

causes severe immune reaction after repeated exposure

toxic

causes adverse health effects

other symbols:

1. fish and tree

2. shadowed human with star in their heart

3. things shooting out of a ball

4. rolling pin

1. aquatic toxicity

2. carcinogen or toxic

3. explosive

4. gas under pressure

NFPA diamond

Blue = health

red = Flammability

yellow= instability

white = special

What percentage of known chemicals have safety data sheets (SDS)?

0.1%

Who creates SDS?

chemical suppliers

What GHS components are incorporated in SDS?

hazard ratings. precautionary statements, pictograms, signal words and hazard statements

are sds legally required to be accurate?

No, you should read sds from many different manufacturers to be safe.

sds are written for what kind of setting?

Industrial, because of this, chemical hazards and personal protective equipment requirements may be overstated. However, the SDS is like wikipedia, it's a good place to start.

Order the steps for using a SDS to fully understand the hazards associated with the chemical.

1. compare label info to ensure you have the right sds

2. determine the hazard class (corrosive, flammable, etc.)

3. look at procedures for safe handling

In the event of a liquid spill....

large Volatile spills require evacuation

Contaminated clothing must be removed & treated as hazardous waste

Use a spill pillow to absorb liquids with nontoxic vapors

Eyewashes should be used for at least 15 minutes.

If splashed with a large quantity of a chemical, use the shower immediately

If you spill a solid....

Spilled solid should NOT be returned to its original bottle

If solid is spilled on skin wash scrape off, then wash with water

Use a small brush & dustpan when cleaning up a solid.

Key steps to responding to a spill

1. Evacuate

2. Communicate

3. isolate

4. Mitigate

1. if the spill is large and/or hazardous, leave the building or room

2. notify instructor or stockroom staff of the spill location and contents

3. if possible, contain the spill with a spill pillow, sand, etc.

4. spill clean up. your instructor will determine if you are able to assist.

When handling a corrosive...

carry bottles in secondary containers

wear goggles, lab coat & gloves

if exposed wash off skin immediately

use in the fume hood if the corrosive is an inhalant hazard

know the location of eyewash stations & safety showers

wear long sleeved shirts, long pants, & liquid shedding close toed shoes

100mL graduated cylinder

1 Sf after decimal

50mL buret

2SF after decimal

Beakers and Erlenmeyer Flasks

don’t use to measure.

crystal violet solution

warning,

corrosion

!

serious eye irritation

Suspected of causing cancer.

Harmful to aquatic life with long lasting effect

citric acid

warning

!

serious eye irritation

may cause respritory issuues

Sodium hypochlorite solution (bleach…)

corrosive

environmenmt

danger

May be corrosive to metals.

Causes severe skin burns and eye damage.

Very toxic to aquatic life.

Toxic to aquatic life with long lasting effects.

Sodium hydroxide solution

warning

corrosive

May be corrosive to metals

Sodium bicarbonate

not hzardous

Sodium acetate

not hzardous

Hydrochloric acid solution

warning

corrosive

May be corrosive to metals.

Ammonium Hydroxide GR ACS

danger

!

environment

corrosiive

Causes severe skin burns and eye damage.

May cause respiratory irritation.

Very toxic to aquatic life.

Toxic to aquatic life with long lasting effects.

Ammonium chloride

!

warning

Causes serious eye irritation.

harmful if swallowed

• call poisin center

Acetic acid 1 mol/L

not hazardous

what in spil kit?

Vermiculite

tartrazine

yellow 5

sunset yellow

yellow 6

allura red

red 40

brillient blue

blue 1

beers law

A=elc

• \(A\) = Absorbance (unitless)

• \(\epsilon \) = Molar absorptivity or molar extinction coefficient

• \(l\) = Path length of the sample, usually in cm

• \(c\) = Concentration of the solution, usually in mol/L