What safety precautions should you take when working with acetic anhydride?

Acetic Anhydride poses a hazards from exposure to mouth, nose and throat, skin, eyes that can cause cough, shortness of breath, sore throat, skin burns, blisters, redness and pain in the eyes, abdominal pain and shock.

when working with acetic anhydride, safety precautions include:

1.       REFRAIN from any form of CONTACT. Wear protective clothing, gloves, goggles and face shield/ breathing protection.

2.       Provide adequate ventilation.

3.       Avoid open flames and smoking.

4.       Use explosion-proof electrical equipment.

answer: c.

explanation:

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.