Melting point :195°C
Boiling point :561.26°C (rough estimate)
alpha :+17～+24°(D/20℃)(c=1,Na2CO3 soln.)(calculated on the dehydrous basis)
Density :1.4080 (rough estimate)
refractive index :1.6910 (estimate)
Flash point :11℃
storage temp. :Keep in dark place,Inert atmosphere,Store in freezer, under -20°C
solubility :H₂O: insoluble
form :powder
pka :pKa 3.04/4.99(H2O,t =25,I=0.0025) (Uncertain)
color :Light yellow to yellow
Water Solubility :Insoluble. <0.1 g/100 mL at 19 ºC
Sensitive :Light Sensitive & Hygroscopic
Merck :14,5985
BRN :70669
BCS Class :3
Stability :Stable, but light sensitive and hygroscopic. Incompatible with strong acids, strong oxidizing agents. Store at -15C or below.
InChIKey :FBOZXECLQNJBKD-ZDUSSCGKSA-N
CAS DataBase Reference :59-05-2(CAS DataBase Reference)
NIST Chemistry Reference :Methotrexate(59-05-2)
IARC :3 (Vol. 26, Sup 7) 1987
EPA Substance Registry System :Methotrexate (59-05-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501
Precautionary statements:	P201 Obtain special instructions before use. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.