the dangers of dihydrogen monoxide

via improbable research:
the Material Safety Data Sheet for the much-discussed substance dihydrogen monoxide:

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MATERIAL SAFETY DATA SHEET FOR DIHYDROGEN MONOXIDE
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PRODUCT NAME: DIHYDROGEN MONOXIDE
FORMULA WT: 18.00
CAS NO.: 07732-18-5
NIOSH/RTECS NO.: ZC0110000
COMMON SYNONYMS: DIHYDROGEN OXIDE, HYDRIC ACID
PRODUCT CODES: 4218,4219
EFFECTIVE: 05/30/86
REVISION #01

LABORATORY PROTECTIVE EQUIPMENT
SAFETY GLASSES; LAB COAT
PRECAUTIONARY LABEL STATEMENTS
STORAGE: KEEP IN TIGHTLY CLOSED CONTAINER.
BOILING POINT: 100 C ( 212 F)
VAPOR PRESSURE(MM HG): 17.5
MELTING POINT: 0 C ( 32 F)
VAPOR DENSITY(AIR=1): N/A
SPECIFIC GRAVITY: 1.00
EVAPORATION RATE: N/A
SOLUBILITY(H2O): COMPLETE (IN ALL PROPORTIONS) % VOLATILES BY VOLUME: 100
APPEARANCE & ODOR: ODORLESS, CLEAR COLORLESS LIQUID.
TOXICITY: LD50 (IPR-MOUSE)(G/KG) – 190
LD50 (IV-MOUSE) (MG/KG) – 25
DISPOSAL PROCEDURE
DISPOSE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL, STATE,
AND LOCAL ENVIRONMENTAL REGULATIONS.
SAF-T-DATA(TM) STORAGE COLOR CODE: ORANGE (GENERAL STORAGE)
SPECIAL PRECAUTIONS
KEEP CONTAINER TIGHTLY CLOSED. SUITABLE FOR ANY GENERAL CHEMICAL STORAGE
AREA. DIHYDROGEN MONOXIDE IS CONSIDERED A NON-REGULATED PRODUCT, BUT
REACTS VIGOROUSLY WITH SOME MATERIALS. THESE INCLUDE SODIUM, POTASSIUM
AND OTHER ALKALI METALS; ELEMENTAL FLUORINE; AND STRONG DEHYDRATING AGENTS
SUCH AS SULFURIC ACID. IT FORMS EXPLOSIVE GASES WITH CALCIUM CARBIDE.
AVOID CONTACT WITH ALL MATERIALS UNTIL INVESTIGATION SHOWS SUBSTANCE IS
COMPATIBLE. EXPANDS SIGNIFICANTLY UPON FREEZING. DO NOT STORE IN RIGID
CONTAINER AND PROTECT FROM FREEZING.
DOMESTIC (D.O.T.)
PROPER SHIPPING NAME CHEMICALS, N.O.S. (NON-REGULATED)
INTERNATIONAL (I.M.O.)
PROPER SHIPPING NAME CHEMICALS, N.O.S. (NON-REGULATED