Comparison of Regulatory Requirements For Aries Magnesium Hydroxide Slurry vs. Caustic Soda

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Magnesium
Hydroxide
Sodium Hydroxide
Common Name Magnesium Hydroxide, Milk of Magnesia Sodium Hydroxide, Liquid Caustic Soda 50%
GHS Signal Word None Required danger
GHS Pictogram None Required Corrosive corrosive symbol Acute Health Hazard hazard symbol
H314: Causes severe skin burns and eye damage.
H335: May cause respiratory irritation.
P307+315: If exposed, get immediate medical attention.
P301+P330+P331: IF SWALLOWED: Rinse mouth. Do not induce vomiting.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P264: Wash thoroughly after handling.
P273: Avoid release into the environment.
Onset of symptoms may be delayed following exposure.
DOT List
DOT Placard
Not Regulated
None Required
DOT 1824-154 (solution) CORROSIVE class 8 corrosive CLASS 8
NFPA 704 0-0-0 0-0-0 corrosive symbol 3-0-1 CORROSIVE 3-0-1 corrosive symbol
CDC – NIOSH Not Listed RTECS Number: WB4900000
TSCA (40 CFR 710) ID 8137 CAS 1309-42-8 ID 8150 CAS 1310-73-2
USA – RCRA Not Listed D002 (Corrosive Waste) Waste may be hazardous waste.
USA – OSHA Not Listed OSHA Serious Violation for not wearing eye and face protection
Standard 29 CFR 19100.133 (a) (1) – Substance 2260
USA – CERCLA
Reportable Quantity
Not Listed 1000# as NaOH; 2000# = 1320 gallons @50% solids
SARA Title III 311/312 Not Listed Acute Health Hazard
Canadian: WHMIS Domestic Substance List:
Listed
class E corrosive symbol Class E Corrosive Material
Ingredient Disclosure List: Listed
Domestic Substance List: Listed Corrosive 1B, STOT-SE 3
Stability & Reactivity Does not react violently with water. Stable. Direct contact with water may cause a violent exothermic reaction. This material reacts violently with acids, organic halogen compounds and metals (zinc, tin, aluminum etc.) giving off highly flammable hydrogen gas.

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