Choline hydroxide is reported in EPA TSCA Inventory.

The Choline hydroxide, with the CAS registry number 123-41-1, is also known as Sincaline. Its molecular formula is C₅H₁₅NO₂ and its systematic name is IUPAC name is 2-hydroxyethyl(trimethyl)azanium hydroxide. Additionally, its product categories are Quarternary Ammonium Bases; Vitamin Related Compounds; Ammonium Hydroxides (Quaternary); Biochemistry; Quaternary Ammonium Compounds; Vitamins; Chemical Synthesis; Organic Bases; Synthetic Reagents. This chemical tates bitter and it's soluble in water, ethanol, but insoluble in ether.It is a clear light yellow viscous solution which is stable, combustible,incompatible with strong oxidizing agents.

Other characteristics of Choline hydroxide can be summarised as followings: 
(1)ACD/LogP: -3.70; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -3.7; (4)ACD/LogD (pH 7.4): -3.7; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 2; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 9.23 Å².

Production method of the Choline hydroxide:
It could be obtained by the reactants of Trimethylamine ethanol and Ethylene oxide. This reaction needs the temperature of 30 °C and stirring for 4h.
(CH₃)₃N+(CH₂CH₂)O+H₂0→[(CH₃)₃N+CH₂CH₂OH]OH-

Uses of the Choline hydroxide:
It's used as organic synthesis intermediates and for biochemical research. It could react with 7-chloro-4-hydroxy-2H-pyridazino[4,5-b]quinolin-1-one to obtain the (2-hydroxy-ethyl)-trimethyl-ammonium; 7-chloro-1-oxo-1,2-dihydro-pyridazino[4,5-b]quinolin-4-olate. This reaction needs the solvent of methanol. The yield is 97 %. In addition, the type of this reaction is addition.


Safety information of Choline hydroxide:
When you are using this chemical, please be cautious about it as the following: This chemical causes burns and it's toxic by inhalation, in contact with skin and if swallowed. It has danger of very serious irreversible effects. Wear suitable protective clothing, gloves and eye/face protection if you use it. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. As it's flammable, keep it away from the sources of ignition.

You can still convert the following datas into molecular structure:
1.SMILES: [OH-].OCC[N+](C)(C)C
2.InChI: InChI=1/C5H14NO.H2O/c1-6(2,3)4-5-7;/h7H,4-5H2,1-3H3;1H2/q+1;/p-1
3.InChIKey: KIZQNNOULOCVDM-REWHXWOFAT

The toxicity data of Choline hydroxide is as follows: