Dimethyldichlorosilane , CP,96.0% , 75-78-5
Synonym(s):
Dichlorodimethylsilane;Dimethyldichlorosilane;DMDCS;Sylon CT;Silane M2
CAS NO.：75-78-5
Empirical Formula: C2H6Cl2Si
Molecular Weight: 129.06
MDL number: MFCD00000491
EINECS: 200-901-0
PRODUCT Properties
| Melting point: | -76 °C |
| Boiling point: | 70 °C(lit.) |
| Density | 1.333 g/mL at 20 °C |
| vapor pressure | <200 hPa (20 °C) |
| refractive index | n |
| Flash point: | 3 °F |
| storage temp. | Store below +30°C. |
| solubility | sol chlorinated solvents and ethereal solvents; reacts
with protic solvents. |
| form | liquid |
| Specific Gravity | 1.0637 |
| color | colorless |
| explosive limit | 1.75-48.5%(V) |
| Water Solubility | reacts |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 8: reacts rapidly with moisture, water, protic solvents |
| BRN | 605287 |
| Stability: | Stable. Reacts violently with water and alcohols. Highly flammable. Incompatible with strong oxidizing agents, water, alcohols, caustics, ammonia. |
Description and Uses
Dimethyldichlorosilane is a colorless liquidwith sharp, irritating odor. Molecular weight= 129.07;Specific gravity = 1.07 at 25℃; Boiling point = 70.5℃;Melting point=86℃; Vapor pressure= 110 mmHg at20℃; Flash point = 27℃; Autoignition temperature=375℃. Explosive limits: LEL = 3.4%; UEL=9.5℃.Hazard Identification (based on NFPA-704 M Rating
Dichlorodimethylsilane is used to prepare a resin bound siloxane with tertiary alcohols and it is also used as a reagent for synthesis of optically active ansa-mettallocene polymerization catalysts. It acts as a precursor to silicone and polysilane compounds. It is also used in the glass coating to protect it from micro particles. It is involved in the preparation of resin bound siloxane with reactivity towards tertiary alcohols.
Safety
| Symbol(GHS) |     GHS02,GHS05,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H225-H304-H314-H336-H361d-H373-H412 |
| Precautionary statements | P210-P280-P301+P330+P331-P303+P361+P353-P304+P340+P310-P305+P351+P338 |
| Hazard Codes | Xn,Xi,F,N,C |
| Risk Statements | 20-59-36/37/38-11-67-65-63-48/20-38-20/21-50/53-37-35-20/22-14-34 |
| Safety Statements | 60-61-62-36/37-59-45-36/37/39-26-16-7/9-2 |
| RIDADR | UN 2924 3/PG 2 |
| WGK Germany | 3 |
| RTECS | VV3150000 |
| F | 3-10-19-21 |
| Autoignition Temperature | 425 °C |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29310095 |
| Toxicity | LD50 orally in Rabbit: 6056 mg/kg |
