Question

a. Report hazard/safety precautions that must be followed when handling NaBH4, H2O2 (aq., 30% v/v), and acetic acid (glacial). Use reagent MSDS information.

b. Briefly describe the use of Bradyʼs reagent to identify the presence of electrophilic carbonyl groups.

Answer 1

a)

1]NaBH4 - SODIUM BOROHYDIDE

HAZARDS INDENTIFICATION

It is Extremely hazardous in case of skin contact, of eye contact , of ingestion, of inhalation. Very hazardous in case of skin contact (corrosive).

The amount of tissue damage depends on length of contact. Eye contact can result in corneal damage or blindness. Skin contact can produce inflammation and blistering.

Inhalation of dust will produce irritation to gastrointestinal or respiratory tract, characterized by burning, sneezing and coughing. Severe over-exposure can produce lung damage, choking, unconsciousness or death. Inflammation of the eye is characterized by redness, watering, and itching.

Skin inflammation is characterized by itching, scaling, reddening, or, occasionally, blistering.

safety

1]Eye Contact

Immediately flush eyes with running water for at least 15 minutes, keeping eyelids open. Cold water may be used. Do not use an eye ointment.

2] Skin Contact:

If the chemical got onto the clothed portion of the body, remove the contaminated clothes as quickly as possible, protecting your own hands and body Cold water may be used. If irritation persists, seek medical attention.

3]Serious Skin Contact:

Wash with a disinfectant soap and cover the contaminated skin with an anti-bacterial cream. Seek immediate medical attention.

4]Inhalation: Allow the victim to rest in a well ventilated area. Seek immediate medical attention. Serious Inhalation: Evacuate the victim to a safe area as soon as possible.

B] H2O2 - HYDROGEN PEROXIDE

Potential Hazards/Toxicity

HAZRDS IDENTIFICATION

1]Hydrogen peroxide is a strong oxidizer materials. It is corrosive and light-sensitive. It is toxic if swallowed.

2It may be harmful if inhaled or absorbed through the skin. May cause burns to digestive and respiratory tract. May cause nausea, vomiting, diarrhea, damage to the red blood cells, stomach distension, bleeding of the stomach, cerebral swelling, and ulcer formation.

SAFETY

1] Move person into fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Consult a physician.

2]Wash off with soap and plenty of water for at least 15 minutes while removing contaminated clothing. Consult a physician.

3] Rinse thoroughly with plenty of water for at least 30 minutes lifting upper and lower eyelids and removing contact lenses. Consult a physician. Continue rinsing eyes during transport to hospital.

C]Acetic acid (glacial).

hazrds identification

1] Inhalation: severe irritation or burns of respiratory system, convulsions, bronchitis and cardiovascular collapse 2]teeth damage and respiratory failure.

3]Eyes/Skin: may cause severe burns and permanent eye damage. also severe cases of over exposure can cause erythema, blisters, skin blackening, tissue destruction with slow healing, hyperkeratosis, fissures, corneal erosion, iritis, conjunctivitis, and blindness

4] Ingestion: burns, nausea, shock, may be fatal. causes damage to the digestive tract. may include bloody diarrhea, edema

safety

1] Inhalation: remove to fresh air. If not breathing give artificial respiration. If breathing is difficult give oxygen.

2] Eyes/Skin: immediately flush eyes and skin with water for at least 15minutes, while removing contaminated clothing.

3]Ingestion: wash out mouth with water provided the person is conscious. call a physician