§ 171. Definitions. 1. The term "dangerous caustic or corrosive
substance" means each and all of the acids, alkalis, and substances
named below: (a) hydrochloric acid and any preparation containing free
or chemically unneutralized hydrochloric acid (HCI) in a concentration
of ten per centum or more; (b) sulphuric acid and any preparation
containing free or chemically unneutralized sulphuric acid (H2SO4) in a
concentration of ten per centum or more; (c) nitric acid or any
preparation containing free or chemically unneutralized nitric acid
(HNO3) in a concentration of five per centum or more; (d) carbolic acid
(C6H5OH), otherwise known as phenol, and any preparation containing
carbolic acid in a concentration of five per centum or more; (e) oxalic
acid and any preparation containing free or chemically unneutralized
oxalic acid (H2C2O4) in a concentration of ten per centum or more; (f)
any sale of oxalic acid other than cerium oxolate and any preparation
containing any such salt in a concentration of ten per centum or more;
(g) acetic acid or any preparation containing free or chemically
unneutralized acetic acid (HC2H302) in a concentration of twenty per
centum or more; (h) hypochlorus acid, either free or combined, and any
preparation containing the same in a concentration so as to yield ten
per centum or more by weight of available chlorine, excluding calx
chlorinate, bleaching powder, and chloride of lime; (i) potassium
hydroxide and any preparation containing free or chemically
unneutralized potassium hydroxide (KOH), including caustic potash and
Vienna paste, in a concentration of ten per centum or more; (j) sodium
hydroxide and any preparation containing free or chemically
unneutralized sodium hydroxide (NaOH), including caustic soda and lye,
in a concentration of ten per centum or more; (k) silver nitrate,
sometimes known as lunar caustic, and any preparation containing silver
nitrate (AgNO3) in a concentration of five per centum or more, and (l)
ammonia water and any preparation yielding free or chemically uncombined
ammonia (NH3), including ammonium hydroxide and "hartshorn," in a
concentration of five per centum or more.

2. The term "misbranded parcel, package, or container" means a retail
parcel, package, or container of any dangerous caustic or corrosive
substance for household use, not bearing a conspicuous, easily legible
label or sticker, containing (a) the name of the article; (b) the name
and place of business of the manufacturer, packer, seller, or
distributor; (c) the word "POISON," running parallel with the main body
of reading matter on said label or sticker, on a clear, plain background
of a distinctly contrasting color, in uncondensed gothic capital
letters, the letters to be not less than twenty-four point size, unless
there is on said label or sticker no other type so large, in which event
the type shall be not smaller than the largest type on the label or
sticker, and (d) directions for treatment in case of accidental personal
injury by the dangerous caustic or corrosive substance: Provided, that
such directions need not appear on labels or stickers on parcels,
packages, or containers at the time of shipment or of delivery for
shipment by manufacturers or wholesalers for other than household use.