Most lab supply stores should have it.
Grainger has it, and they have local outlets in most larger cities in the USA.
http://www.grainger.com/Grainger/wwg/search.shtml?searchQuery=litmus&op=search&Ntt=litmus&N=0&sst=All
Here is a Froogle/Google Products Search:
http://www.google.com/products?q=litmus+paper&oe=utf-8&ie=UTF-8&sa=N&hl=en&output=nojs&scoring=p
E-Bay is also a good source for small quantities of obscure supplies.
Some notes indicate that pool supply stores may also have pH monitoring supplies.
Here are some notes about using ground Turmeric (a common spice) for titrations of vegetable oil for making biodiesel. I presume similar methods could be used for other titrations. Methanol is toxic, but it should work with isopropanol, ethanol, or perhaps even water.
http://www.biodieseldiscussion.com/forums/showthread.php?t=33574
Throw them in the bin.
Litmus paper.
Litmus paper can be used to determine if a solution is acidic or basic
In a neutral solution the litmus paper is purple.
The litmus paper is used to evaluate the pH of a solution.
Red litmus paper and blue litmus paper. Blue litmus paper turns red in the presence of an acid and red litmus paper turns blue in the presence of an alkali.
Litmus paper.
You cannot predict pregnancy with litmus paper. litmus paper detect pH not HCG
yes a blue litmus paper turns red when put into an acid
litmus paper nutral
It depends. Litmus paper is used to test pH levels. Blue litmus paper turns red in the presence of acids, and red litmus paper turns blue in the presence of alkalines. Litmus paper is purple in neutral conditions.
Litmus paper can be used to determine if a solution is acidic or basic
In a neutral solution the litmus paper is purple.
The litmus paper is used to evaluate the pH of a solution.
A base.An alkali turns litmus paper blue.The solution is a base.
the color of the litmus paper does not change.
this is a fun expierement cuz it will turn the blue litmus paper into red litmus paper!
Red litmus paper is used to check for basicity. It turns blue when exposed to bases. Blue litmus paper is used to check for acidity. It turns red when exposed to acids.