Items touched by a dog should be washed seven times

e14.1 Filth means:

(1) urine

(2) excrement;

(3) blood;

(4) pus;

(5) vomit;

(6) wine;

(7) any liquid intoxicant (n: including, for the Shafi'i school, anything containing alcohol such as cologne and other cosmetics, though some major Hanafi scholars of this century, including Muhammad Bakhit al-Muti'i Egypt and Badr al-Din al-Hasani of Damascus, have given formal legal opinions that they are pure (tahir) because they are not produced or intended as intoxicants.(N: Other scholars hold they are not pure, but their use is excusable to the extent strictly demanded by necessity.) 

While it is religiously more precautionary to treat them as filth, the dispensation exists when there is need, such as for postoperative patients who are unable for some time after their surgery to wash away the alcohol used to sterilize sutures. And Allah knows best.

N:As for solid intoxicants, they are not filth, though they are unlawful to take,eat, or drink);

(8) dogs and pigs, or their offspring;

(9) wady and madhy (def:e10.5);

(10) slaughtered animals that (N: even when slaughtered) may not be eaten by Muslims (def:16);

(11) not slaughtered dead animals other than aquatic life, locusts, or humans (A: which are all pure, even when dead, though amphibious life is not considered aquatic and filth when dead);

(12) the milk of animals (other than human) that may not be eaten:

(13) the hair of not slaughtered dead animals;

(14) and the hair of animals (other than human) that may not be eaten, when separated from them during their life

(N: or after their death. As for before it is separated from them, the hair is the same as the particular animal, and all animals are pure during their life except dogs and swine). (n: In the Hanafi school, the hair of an not slaughtered dead animal (other than swine), its bones, nails (hoofs), horns, rennet and all parts not imbued with life while it was alive (A: including its ivory) are pure (tahir). That which is separated from a living animal is considered as if from the not slaughtered dead of that animal (Hashiya radd al-muhtar ala al-Durr al-mukhtar sharh Tanwir al-absar (y47, 1.206-7).)

e14.2 Rennet (n: a solidifying substance used in cheese-making) is pure if taken from a slaughtered (def:j17) suckling lamb or kid that has eaten nothing except milk.

e14.3 That which comes from the mouth of a sleeping person is impure if from the stomach, but pure if from the saliva ducts.

e14.4 Text only available in Arabic

e14.5 The following are pure:

(1) seminal fluid that has reached the stages of gestation in the womb, becoming like a blood clot and then becoming flesh;

(2) the moisture (N: mucus) of a woman's private parts (O: as long as it remains inside the area that need not be washed in the purificatory bath (def: e11.1(b). end) though if it exit, it is impure);

(3) the eggs of anything;

(4) the milk, fur, wool, or feathers of all animals that may be eaten, provided they are separated from the animal while living or after properly slaughtered;

(5) human milk, male sperm, and female sexual fluid (def:e10.4).\

e14.6 No form of filth can become pure, except:

(1) wine that becomes vinegar;

(2) the hide of an not slaughtered dead animal that is tanned;

(3) new animate life that comes from filth (O:such as worms that grow in carrion);

(4) (n: and for the Hanafis, filth which is transformed [molecularly changed] into a new substance, such as a pig becoming soap, etc. (al-Hadoyya al-Ala'iyya (y), 54)).

Wine that becomes vinegar without anything having been introduced into it is pure, as are the sides of the container it touched when it splashed or boiled. But if anything was introduced into the wine before it became vinegar, then turning to vinegar does not purify it. (A: In the Hanafi school it is considered pure whether or not anything has been introduced into it.)

Tanning means removing from a hide all excess blood, fat, hair and so forth-by using an acrid substance, even if impure. Other measures such as using salt, earth, or sunlight, are insufficient. Water need not be used while tanning, though the resultant hide is considered like a garment affected with filth, in that it must be washed with purifying water before it is considered pure. Hides of dogs or swine cannot be purified by tanning. Any hair that remains after tanning has not been made pure, though a little is excusable.

e14.7 Something that becomes impure by contact.(def:below) with something from dogs or swine does not become pure except by being washed seven times, one of which (recommended not to be the last) must be with purifying earth (def: e12.1 (b)) mixed with purifying water, and it must reach all of the affected area. One may not substitute something else like soap or glasswort in place of earth.

(n: The contact referred to is restricted, in the Shafi'i school, to contamination by traces of moisture from dogs or swine, whether saliva, urine, anything moist from them, or any of their dry parts that have become moist (Mughni al-muhtaj ila ma'rifa alfaz al- Minhaj (y73), 1.83). (A: If something dry such as the animal's breath or hair touches one's person, it need only be brushed away.) In the Maliki school,every living animal is physically pure, even dogs and swine (al-Fiqh 'ala al-madhahib al-arba'a (y66), 1.11) (A: and they consider the above sevenfold washing as merely a sunna). While more precautionary to follow the Shafi'i school, the dispensation exists for those who have difficulty in preventing contamination from dogs, provided their prayer with its prerequisites is considered valid in the Maliki school (dis:c6.4(end) and w14.1(6)). And Allah knows best.)

e14.8 Text only available in Arabic

e14.9 The urine of a baby boy who has fed on nothing but human milk can be purified from clothes by sprinkling enough water on the spot to wet most of it, though it need not flow over it. The urine of a baby girl must be washed away as an adult's is.