Just to note that there are a lot of patina solutions that say
"verdigris" or the colour it is imitatiing is that of “verdigris”,
that doesn’t necessarily mean the solution is made from copper
acetate or the crystalline form of true verdigris rather it is more
often a product like’ blue stone’ as is sold in the simples section
of chemist’s (pharmacys in the US) stores,next to products like
rosewater and glycerine,water glass and gum tragacanth, aqua fortis,
acidum boricum, etc… Blue stone is copper sulphate- like the less
refined form sold in garden supply stores, it comes in the form of a"
rock"…which, by the way, used to be used for toothaches (wet the
rock slightly, apply to the cavity, and voila! dead nerve in a bout
10 minutes. it was also used directly in eyes to CAUSE blindness.),
to make home canned (put up in jars) pickles greener, as a pond algae
preventative and 101 other folk-ish uses with that 'grain of truth’
associated with the folk uses. A very common to jewelry example is
Jax brand “verdigris” patina which is made of sal ammoniac and blue
stone ( or ammonium chloride and copper sulfate) and newer bottles of
the stuff are just called Green Patina… So verdigris is not really
made of verdigris… and copper salts which form from skins contacting
copper bracelets are not nearly as noxious as if one applied a wek
solution of verdigris to their skin, and crystals of venus and
crystals of verdigris are slightly different form of copper acetate -
one being copper diacetate and the other copper acetate
respectively… nonetheless, the verdigris is poisonous when
ingested, the risk in handling it is below so I hope this ends this
thread and discussion about the dangers- essentially folks- don’t eat
the stuff, breathe the dust or do anything stupid with pure
crystalline verdigris, or crystals of venus…:and if that weren’t
enough below are the synonyms for verdigris- just so
there isn’t any confusion…rer
Aceticacid, Acetic acidcupric salt;Copper acetate
(Cu(C2H3O2)2);Copper acetate(Cu(MeCO2)2);Copper diacetate;Copper(2+)
acetate;Copper(2+) diacetate;Copper(II) acetate;Crystallized
verdigris;Crystals of Venus;Cupric acetate;Cupric diacetate;Neutral
According to OSHA Chemical Safety Regulatory Information Codes: these
codes are highlighted (22-36/37/38-50/53) and apply to copper
sulphate,all below apply to verdigris, and also to its close
relative, crystals of venus (copper diacetate):
S1 Keep locked up.
S2 Keep out of the reach of children.
S3 Keep in a cool place.
S4 Keep away from living quarters.
S5 Keep contents under… (there follows the name of a liquid).
S6 Keep under… (there follows the name of an inert gas).
S7 Keep container tightly closed.
S8 Keep container dry.
S9 Keep container in a well-ventilated place.
S12 Do not keep the container sealed.
S13 Keep away from food, drink and animal foodstuffs.
S14 Keep away from… (a list of incompatible materials will
S15 Keep away from heat.
S16 Keep away from sources of ignition.
S17 Keep away from combustible material.
S18 Handle and open container with care.
S20 When using, do not eat or drink.
S21 When using do not smoke.
S22 Do not breathe dust.
S23 Do not breathe vapour.
S24 Avoid contact with skin.
S25 Avoid contact with eyes.
S26 In case of contact with eyes, rinse immediately with plenty of
water and seek medical advice.
S27 Take off immediately all contaminated clothing.
S28 After contact with skin, wash immediately with plenty of
S29 Do not empty into drains.
S30 Never add water to this product.
S33 Take precautionary measures against static discharges.
S35 This material and its container must be disposed of in a safe
S36 Wear suitable protective clothing.
S37 Wear suitable gloves.
S38 In case of insufficient ventilation, wear suitable respiratory
S39 Wear eye / face protection.
S40 To clean the floor and all objects contaminated by this
material, use … (there follows suitable cleaning material).
S41 In case of fire and / or explosion do not breathe fumes.
S42 During fumigation / spraying wear suitable respiratory