KH-590 (CAS No. 14814-09-6)

The chemical name of our KH-590 silane coupling agent is 3-Mercaptopropyltriethoxysilane. CAS number is 14814-09-6. Molecular formula of this compound is C9H22O3SSi. Its structural formula is as below:

Physical Properties of 3-Mercaptopropyltriethoxysilane

1. CAS No. : 14814-09-6
2. Physical Form: Transparent liquid
3. Color: light yellow
4. Molecular Weight: 238.42
5. Specific Gravity at 25/25°C: 0.993
6. Boiling Point: 210°C
7. Refractive Index (nD 25°C): 1.4331
8. Flash Point, Pensky-Martens Closed Cup(1): 88°C


The 3-Mercaptopropyltriethoxysilane is mainly used with the inorganic fillers like carbon black and SiO2, etc. It is capable of activating, coupling, cross linking and reinforcing in polymers, such as rubber and silicone rubber, etc. It also has the functions similar as KH-580.

Handling and Storage

The 3-Mercaptopropyltriethoxysilane is usually sealed and stored in cool and well ventilated place away from fire and water.


The information provided herein was believed by Jiangsu Chenguang Silane Co., Ltd. to be accurate at the time of preparation or prepared from sources believed to be reliable, but it is the responsibility of the user to investigate and understand other pertinent sources of information, to comply with all laws and procedures applicable to the safe handling and use of the product, and to determine the suitability of the product for user's intended application or use. All products supplied by Chenguang are subject to Chenguang's standard terms and conditions of sale. Chenguang makes no warranty, express or implied, concerning the product or the merchantability or fitness thereof for any purpose or concerning the accuracy of any information provided by Chenguang, except that the product shall conform to Chenguang's specifications. Nothing contained herein constitutes an offer for the sale of any product.

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