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Properties of Important Inorganic Pharmaceuticals
1. Ferrous sulphate: It is odourless, bluish-green crystalline powder. It effloresces in dry air. It has astringent or metallic taste.
2. Carbonyl iron: It appears as a gray powder made up of spherical microparticles.
3. Aluminium hydroxide gel: It is the suspension of hydrated Al2O3 (aluminium oxide). Its pH is 5.5 to 8.0. Small amounts of clear liquid may separate from it on standing.
4. Magnesium hydroxide: It is white amorphous powder, odourless and tasteless, insoluble in water.
5. Magaldrate: Chemically, magaldrate is a combination of aluminum and magnesium hydroxide.
6. Sodium bicarbonate: It is colourless, crystalline powder. Odourless with saline taste. Soluble in water and insoluble in alcohol.
7. Calcium carbonate: (i) It is a fine, white, microcrystalline powder. (ii) It is odourless, tasteless and stable in air. (iii) It is insoluble in water and alcohol. (iv) It dissolves with effervescence in most common dilute acids like acetic acid, dilute HCl.
8. Hydrochloric acid: (i) It is a colourless fuming liquid with pungent odour. (ii) It is miscible with water, alcohol. (iii) Its specific gravity is 1.18. (iv) It gets oxidized by strong oxidizing agents liberating chlorine gas.
9. Ammonium chloride: It has saline taste. It is slightly hygroscopic, soluble in water, sparingly soluble in alcohol but freely soluble in glycerine. It sublimes on heating.
10. Bismuth subcarbonate: (i) It is a white or pale yellowish white tasteless powder. (ii) It is stable in air, but is affected by light. (iii) It is insoluble in water and alcohol, but dissolves with effervescence in HCl or HNO3. (iv) When ignited, it decomposes into yellow bismuth trioxide.
To be continued in tomorrow’s blog.........
MCQs
1) All of the following statements about Aluminium hydroxide gel are correct, EXCEPT:
(a) It is the suspension of hydrated Al2O3 (aluminium oxide)
(b) Its pH is 5.5 to 8.0
(c) Small amounts of clear liquid may separate from it on standing
(d) Its category is antiseptic and disinfectant
2) Which one of the following compounds is a combination of aluminum and magnesium hydroxide?
(a) Alumina
(b) Magaldrate
(c) Simethicone
(d) Ferumoxytol
3) Specific gravity of Hydrochloric acid is ______.
(a) 1.0
(b) 1.18
(c) 2.0
(d) 2.18
4) Which of the following compounds dissolves with effervescence in HCl or HNO3?
(a) Ammonium chloride
(b) Sodium fluoride
(c) Bismuth subcarbonate
(d) Ferrous sulphate
5) What is wrong about Ammonium chloride?
(a) It has saline taste
(b) It sublimes on heating
(c) It is insoluble in water
(d) All of the above options are correct
Check your answers below:
Blog content and MCQs have been taken from the following:
1) Essential Pharmacy Review for Drugs Inspector Exams by Nirali Prakashan, Pune
To know more about the book:
Click here
2) Pharmacist Recruitment Exam by Nirali Prakashan, Pune
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Click here
Check your Answers:
1) d)
2) b)
3) b)
4) c)
5) c)
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