Selenium Disulfide
Selenium Disulfide
CAS: 7488-56-4
Molecular Formula: S2Se
Selenium Disulfide - Names and Identifiers
| Name | Selenium Disulfide |
| Synonyms | exsel seleen selenex Selenium Disulfide thioxoselane sulfide selenium(iv)disulfide epapesticidechemicalcode072003 Selenium disulfide for synthesis |
| CAS | 7488-56-4 |
| EINECS | 231-303-8 |
| InChI | InChI=1/S2Se/c1-2-3/q+4 |
Selenium Disulfide - Physico-chemical Properties
| Molecular Formula | S2Se |
| Molar Mass | 143.09 |
| Density | 2.442[at 20℃] |
| Melting Point | 100 °C |
| Boling Point | decomposes [STR93] |
| Water Solubility | Insoluble in water. |
| Solubility | Practically insoluble in water. |
| Vapor Presure | 0.001Pa at 20℃ |
| Appearance | Powder |
| Color | Red-brown |
| Exposure Limit | ACGIH: TWA 0.2 mg/m3NIOSH: IDLH 1 mg/m3; TWA 0.2 mg/m3 |
| Merck | 14,8436 |
| Storage Condition | Store below +30°C. |
| Use | Antifungal, for the treatment of seborrheic dermatitis, facial acne and body sweat spots |
Selenium Disulfide - Risk and Safety
| Hazard Symbols | N - Dangerous for the environment T,N,T - |
| Risk Codes | R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R33 - Danger of cumulative effects R23/25 - Toxic by inhalation and if swallowed. |
| Safety Description | S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S60 - This material and its container must be disposed of as hazardous waste. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S28A - S20/21 - S28 - After contact with skin, wash immediately with plenty of soap-suds. |
| UN IDs | 2657 |
| WGK Germany | 3 |
| RTECS | VS8925000 |
| TSCA | Yes |
| HS Code | 28309085 |
| Hazard Class | 6.1 |
| Packing Group | II |
| Toxicity | LD50 orally in rats: 138 mg/kg (Cummins, Kimura) |
Selenium Disulfide - Upstream Downstream Industry
Selenium Disulfide - Nature
Open Data Verified Data
orange-yellow to orange-red powder, with slight odor of hydrogen sulfide. Practically insoluble in water and organic solvents. Non-combustible, by the decomposition of high heat release toxic gases.
Last Update：2024-01-02 23:10:35
Selenium Disulfide - Use
Open Data Verified Data
antiseborrheic drugs. For dandruff, seborrhea, scalp seborrheic dermatitis, tinea versicolor and so on. Can cause contact dermatitis, abnormal dryness or greasy of the scalp or hair, hair loss.
Last Update：2022-01-01 09:04:48
Selenium Disulfide - Standard
Authoritative Data Verified Data
This product selenium (Se) should be 52.0% ~ 55.5%.
Last Update：2024-01-02 23:10:35
Selenium Disulfide - Trait
Authoritative Data Verified Data
- This product is orange-yellow to orange-red powder; Slightly odor of hydrogen sulfide.
- This product is almost insoluble in water or organic solvents.
Last Update：2022-01-01 11:30:01
Selenium Disulfide - Safety
Open Data Verified Data
rat oral LDso:138mg/kg. This product has a strong stimulating effect on the eyes, skin and mucosa, and can cause poisoning. Store in a cool, ventilated warehouse. Keep away from fire and heat source. Protection from direct sunlight. The packaging is sealed. Should be stored separately from the oxidant, edible chemicals, avoid mixed storage. The storage area shall be provided with suitable materials for containment of the leakage.
Last Update：2022-01-01 09:04:48
Selenium Disulfide - Differential diagnosis
Authoritative Data Verified Data
- take 10ml of nitration solution under the content determination item, add 5ml of water and 5g of urea, heat to boiling, cool, add 2ml of potassium iodide test solution, which is pale yellow to orange, it rapidly darkened after placement.
- The color developing solution under identification (1) was taken, allowed to stand for 10 minutes, filtered, and 10ml of barium chloride test solution was added to the filtrate to form a precipitate.
Last Update：2022-01-01 11:30:01
Selenium Disulfide - Exam
Authoritative Data Verified Data
soluble selenium
take 5g of this product, accurately weigh, put it in a 150ml flask, accurately add 50ml of water, place it for 1 hour, shake it constantly, filter it, take the filtrate, as a test solution; Another sodium submalate reference, precision weighing, plus nitric acid solution (1-30) dissolved and quantitatively diluted to make a solution containing about lm g per lm l, A solution containing about 0.5ug of selenium per 1 ml was prepared by quantitatively diluting an appropriate amount with water as a reference solution. Take 10ml of the test solution and 10ml of the reference solution respectively, add 2ml of 2.5mol/L formic acid solution respectively, dilute to 50ml with water, and shake well, if necessary, adjust the pH value to 2.0~3.0 with the above formic acid solution, add 2ml of newly prepared 0.5% diaminobenzidine hydrochloride solution to each other, shake well, place for 45 minutes, and adjust the pH value to 6.0~7.0 with ammonia test solution, put the solution into the separatory funnel respectively, Add 10ml of toluene each accurately, shake strongly for 1 min, let stand to make stratification, discard the water layer, separate the toluene solution, according to UV-visible spectrophotometry (General rule 0401), the absorbance was measured at the wavelength of 420mn, and the absorbance of the test solution should not be greater than that of the reference solution (0.0005%).
ignition residue
not more than 0.2% (General rule 0841).
Last Update：2022-01-01 11:30:02
Selenium Disulfide - Content determination
Authoritative Data Verified Data
take this product about O.lg, precision weighing, plus 25ml fuming nitric acid, and heating in a water bath for about 1 hour to complete nitrification, let it cool, move to a 100ml measuring flask, dilute to scale with water, shake well, take 20ml, add urea 10g and water 25ml, heat to boiling, cool, add potassium iodide solution 10ml and starch indicator solution 3ml, immediately with sodium thiosulfate titration solution (0.05mOl/L) titration to the solution from red-brown to orange-red. Each 1 ml of sodium thiosulfate titration solution (0.05mol/L) corresponds to 0.987mg of Se.
Last Update：2022-01-01 11:30:03
Selenium Disulfide - Category
Authoritative Data Verified Data
antiseborrheic drugs.
Last Update：2022-01-01 11:30:03
Selenium Disulfide - Storage
Authoritative Data Verified Data
light shielding, sealed storage.
Last Update：2022-01-01 11:30:03
Selenium Disulfide - Selenium Sulfide Lotion
Authoritative Data Verified Data
This product is a suspension of two sulfide powder. The content of selenium disulfide (SeS2) shall be 90.0% to 110.0% of the labeled amount.
trait
This product is orange-yellow viscous suspension; With aromatic odor.
identification
10ml of the filtrate under the content measurement item was taken, and the same reaction was shown according to the identification test under the disulfide curing item.
examination
- pH value: take 25g of this product, add 50ml of water, mix well, and measure according to law (General rule 0631). The pH value should be 3.0~5.0.
- others should comply with the relevant provisions under the item of lotion (General rule 0127).
Content determination
take this product, shake, weigh properly (about 0.lg of selenium disulfide), add 25ml fuming nitric acid, put it in water bath and heat it for 2 hours, let it cool, and move it into a 100ml measuring flask, dilute to the scale with water, shake, filter, and take 20ml of continued filtrate with precision. According to the method under the item of curing with disulfide, measure according to law from "Adding urea 10G. Each 1 ml of sodium thiosulfate titrant (0.05mol/L) is equivalent to 1. 89mg of SeS2 o
.category
with selenium disulfide.
specification
(l)50g :1.25g (2)100g:2.5g
storability
sealed, stored in the cool dark.
Last Update：2022-01-01 11:30:04
Selenium Disulfide - MSDS-selenium disulfide (Chinese Pharmacopoeia 2010 edition, volume 2)
selenium (Se) should be 52.
[Properties] This product is orange-yellow to orange-red powder; A slight odor of hydrogen sulfide. This product is almost insoluble in water or organic solvents.
[identification] (1) Take 10 m l of nitrifying solution under the content determination item, add 5 m l of water and 5 g of urea, heat to boiling, and cool, add 2ml of potassium iodide solution, which is light yellow to orange, and rapidly darken after placing. (2) take the color-developing solution under identification (1), stand still for 10 minutes, filter, and add 10 m l of barium chloride test solution to the filtrate to form a precipitate.
[inspection] soluble selenide 5.0g of this product, precision weighing, placed in 1 5 0 m l flask, precision add water 5 0 m l, place for 1 hour, the filtrate was taken as the test solution. Another sodium selenite reference substance was added for precision weighing, and nitric acid solution (1 - 3 0) was added. Dissolve and quantitatively dilute to make a solution containing about l m g of selenium per l m l, take an appropriate amount with precision, and quantitatively dilute with water to make about 0. 5% of selenium per l m l. 5g M solution, as a reference solution. Take 1 0 m l of test solution and 1 0 m l of reference solution respectively, add 2 m L of 2.5 m o l/l formic acid solution respectively, and dilute to 5 0 m l with water, shake, if necessary, adjust the p H value to 2 with the above formic acid solution. 03.0, Add 2 m l of new 0.5% diaminobenzidine hydrochloride solution, shake well, place for 45 minutes, and adjust p H value to 6 with ammonia test solution. 0 move into the separatory funnel, add 1 0 m l of toluene precisely, shake strongly for 1 min, stand still to make stratification, discard the water layer, separate the toluene solution, UV-visible spectrophotometry (Appendix IV A ) , at the wavelength of 40 n m, the absorbance of the test solution should not be greater than the absorbance of the control solution (0 . 0 0 05%). Ignition residue shall not exceed 0.2% (Appendix W N).
[determination of containing S] take this product about 0 . l g, precision weighing, plus 25ml fuming nitric acid, and heating in a water bath for about 1 hour to complete nitrification, let it cool, move to a 100ml measuring flask, dilute to scale with water, and shake well, take 20ml, add urea 10g and water 2 5 m l, heat to boiling, cool, add potassium iodide test solution 1 0 m l and starch indicator solution 3ml, immediately titrated with sodium thiosulfate titration solution (0.05mol/L) until the solution changed from red-brown to orange-red. l/l sodium thiosulfate titrant (0 . 05mol/L)
Last Update：2024-04-10 22:29:15
Selenium Disulfide - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | Anti-fungal, for the treatment of seborrheic dermatitis of the head, facial acne and body sweat spots |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 138 mg/kg |
| flammability hazard characteristics | non-combustible; Heated, or exposed to water, the acid emits highly toxic gases such as hydrogen selenide |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from acids and food |
| extinguishing agent | carbon dioxide, dry powder, sand |
| Occupational Standard | TLV-TWA 0.2 mg (selenium)/m3; Tel 0.3 mg (selenium)/M3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:04:16
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Raw Materials for Selenium Disulfide