H2SO4 could do a good job causing blindness on it's own though. You've got me thinking and re-reading them side by side...
The biggest(or only) difference I've found is
test A;
2.1 Classification of the substance or mixture
Classification according to Regulation (EC) No 1272/2008 [EU-GHS/CLP]
Skin corrosion (Category 1A), H314
Acute toxicity, Inhalation (Category 4)
Acute toxicity, Oral (Category 4)
Acute aquatic toxicity (Category 1)
Classification according to EU Directives 67/548/EEC or 1999/45/EC
C Corrosive R35
Very toxic to aquatic organisms. Harmful by inhalation and if swallowed.
2.2 Label elements
Labelling according Regulation (EC) No 1272/2008 [CLP]
Hazard statement(s)
H302 Harmful if swallowed.
H314 Causes severe skin burns and eye damage.
H332 Harmful if inhaled.
H400 Very toxic to aquatic life
Precautionary statement(s)
P273 Avoid release to the environment.
P280 Wear protective gloves/ protective clothing/
eye protection/ face protection.
P310 IF SWALLOWED: Immediately call a POISON CENT
ER or doctor/ physician.
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
Supplemental Hazard Statements
R-phrase(s)
R20/22 Harmful by inhalation and if swallowed.
R50 Very toxic to aquatic organisms.
S-phrase(s)
S24/25 Avoid contact with skin and eyes.
S61 Avoid release to the environment. Refer to special instructions/ Safety data sheets
Test B
2.1 Classification of the substance or mixture
Classification according to Regulation (EC) No 1272/2008 [EU-GHS/CLP]
Skin corrosion (Category 1A), H314
Classification according to EU Directives 67/548/EEC or 1999/45/EC
C Corrosive R35
2.2 Label elements
Labelling according Regulation (EC) No 1272/2008 [CLP]
Hazard statement(s)
H314 Causes severe skin burns and eye damage.
Precautionary statement(s)
P280 Wear protective gloves/ protective clothing/eye protection/ face protection.
P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/ physician.
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Supplemental Hazard Statements
None
So what's in the vial A that's more dangerous to aquatic life then what's in vial B...
Also found a little tidbit on the marquis reagent on wikipedia
"
Methanol may be added to slow down the reaction process to allow better observation of the colour change. This is done by slowing down the
polymerisation process."
(
http://en.wikipedia.org/wiki/Marquis_reagent)