A: Asolution containing the equivalent of about 100mg of anhydrous aluminum chlorohydrate per mLresponds to the tests for Aluminum á191ñand for Chloride á191ñ.

B: Identification of propylene glycol(where stated on the label)—Add about 10mLof isopropyl alcohol to 2g of Solution,mix,and filter.Evaporate the filtrate to about 1mLon a steam bath:the IRspectrum of a film of this solution on a silver chloride disk exhibits maxima only at the same wavelengths as that of a similar preparation of a film of propylene glycol.

C: Identification of dipropylene glycol(where stated on the label)—Add about 10mLof isopropyl alcohol to 2g of Solution,mix,and filter.Evaporate the filtrate to about 1mLon a steam bath:the IRspectrum of a film of this solution on a silver chloride disk exhibits maxima only at the same wavelengths as that of a similar preparation of a film of dipropylene glycol.

D: Identification of alcohol(where stated on the label)—In a small beaker mix 5drops of Solution with 1mLof potassium permanganate solution (1in 100)and 5drops of 2Nsulfuric acid.Immediately cover the beaker with filter paper moistened with a freshly prepared solution of 0.1g of sodium nitroferricyanide and 0.25g of piperazine in 5mLof water:an intense blue color is produced on the filter paper,the color fading after a few minutes.

Standard preparation— Transfer 2.0mLof Standard Iron Solution,prepared as directed under Iron á241ñ,to a 50-mLbeaker.

Test preparation— Transfer 5.3g of the Solution to a 100-mLvolumetric flask,dilute with water to volume,and mix.Transfer 5.0mLof this solution to a 50-mLbeaker.

Procedure— To each of the beakers containing the Standard preparationand the Test preparationadd 5mLof 6Nnitric acid,cover with a watch glass,and boil on a hot plate for 3to 5minutes.Allow to cool,add 5mLof Ammonium Thiocyanate Solution,prepared as directed under Iron á241ñ,transfer to separate 50-mLcolor comparison tubes,dilute with water to volume,and mix:the color of the solution from the Test preparationis not darker than that of the solution from the Standard preparation(75µg per g).

Edetate disodium titrant— Prepare and standardize as directed in the Assayunder Ammonium Alum,except to use 37.2g of edetate disodium,instead of 18.6g.

Test solution— Transfer about 400mg of the Solution,accurately weighed,to a 250-mLbeaker,add 20mLof water and 5mLof hydrochloric acid,and boil on a hot plate for not less than 5minutes,and allow to cool.

Procedure— To the Test solutionadd 25.0mLof Edetate disodium titrant,and adjust with 2.5Nammonium hydroxide or 1Nacetic acid to a pHof 4.7±0.1.Add 20mLof acetic acid-ammonium acetate buffer TS,50mLof alcohol,and 5mLof dithizone TS.The pHof this solution should be 4.7±0.1.Titrate with 0.1Mzinc sulfate VSuntil the color changes from green-violet to rose-pink.Perform a blank titration,and make any necessary correction.Each mLof 0.1MEdetate disodium titrantconsumed is equivalent to 2.698mg of aluminum (Al).Calculate the percentage of aluminum (Al)found,and use this value to calculate the Aluminum/chloride atomic ratio.

Al{[26.98x +(17.01)(3x-1)+35.453]/26.98x},