Our Latest Sản phẩm

Naphthalene General Fact Sheet - Oregon State University

Most naphthalene in the environment will turn into a gas. Some of it may be bound to soil, where it can be taken up by plants. It can also be deposited on plant leaves from the air. Naphthalene is broken down by bacteria, fungi, air, …

SCION 436-GC - Máy sắc ký khí GC | Techno Co., LTD

Hệ thống SCION 436-GC - Máy sắc ký khí GC bao gồm: 01 Máy chính. 01 Lò cột (gắn trên thân máy chính) 01 Bộ nạp mẫu chia dòng/không chia dòng Split/Splitless Injector với điều khiển khí điện tử EFC. 01 Detector FID với điều khiển khí điện tử EFC. 01 …

cas2|Naphthalene, tetrahydro-| ...

(baike.b2star)Naphthalene, tetrahydro-(2),Naphthalene, tetrahydro-(2),CAS,,,。

Naphthalene - Centers for Disease Control and Prevention

Therefore, the revised IDLH for naphthalene is 250 ppm based on acute oral toxicity data in humans [Gerarde 1960]. REFERENCES: 1. AIHA [1967]. Naphthalene. In: Hygienic guide series. Am Ind Hyg Assoc J 28:493-496. 2. Gerarde HW [1960]. Toxicology and biochemistry of aromatic hydrocarbons. Princeton, NJ: Elsevier Publishing Company, p. 228.

Woman accused of putting mothball in candy to get …

Police said the item was described as a cream-filled chocolate-covered candy that had a strong and distinct odor that was consistent with a urinal …

Naphthalene - NIST

Temperature (K) A B C Reference Comment; 353.48 - 452.30: 4.27117: 1831.571-61.329: Fowler, Trump, et al., 1968: Coefficents calculated by NIST from author's data.

Naphthalene, 1-Methylnapthalene, 2-Methylnapthalene ...

Naphthalene is a white solid that evaporates easily. Fuels such as petroleum and coal contain naphthalene. It is also called white tar, and tar camphor, and has been used in mothballs and moth flakes. Burning tobacco or wood produces naphthalene. It has a strong, but not unpleasant smell. The major commercial use of naphthalene is in the manufacture of polyvinyl chloride …

MAPEFLUID N200 | PHỤ GIA SIÊU DẺO TRUNG TÍNH ...

LIÊN HỆ MUA MAPEFLUID N200 – PHỤ GIA SIÊU DẺO TRUNG TÍNH GỐC NAPHTHALENE 1. Nhận hàng thanh toán tại công trình, dự án COD – Quý khách đặt hàng thông qua hotline, website, facebook, youtube… An Tiến Hưng Corp sẽ liên hệ quý khách

2,3-Dihydroxynaphthalene-6-sulfonic acid monosodium …

Hangzhou Colorific Chemicals Co., Ltd. Enquiry for 2,3-Dihydroxy Naphthalene-6-Sulfonic Acid Sodium Salt Address: 9F, BLDG 3D/E, (Westport/ New Territories)206 Zhen Hua Road, San Dun, Hangzhou, China.

Naphthalene - an overview | ScienceDirect Topics

Naphthalene has not been reported to undergo formylation with the usual Vilsmeier–Haack (POCl 3 –DMF) mixture but with the more potent combination of DMF and trifluoromethanesulfonic anhydride, naphthalene-1-carbaldehyde was produced in 50% yield <1991COS(2)777>.POCl 3 –DMF can facilitate the formylation of naphthalene with electron-donating ether substituents at …

Naphthalene (Pharmaceutical Secondary Standard) - Hóa ...

Naphthalene (Pharmaceutical Secondary Standard) Code: PHR1275-1G. CAS Number 91-20-3. Quy cách: 1G. Molecular Weight C10H8 =128.17. grade certified reference material. pharmaceutical secondary standard. Mật độ hơi 4.4 (vs air) Áp suất hơi 0.03 mmHg ( 25 °C)

Long não là gì? Long não đuổi chuột, gián, kiến có hiệu quả ...

Long não có mùi naphtalen giúp đuổi chuột, gián và kiến hiệu quả. Người dùng chỉ cần cho 1 - 2 viên long não vào lồng nhôm hoặc túi lưới và đặt ở nơi chuột, bọ thường đến. Sau một thời gian, long não sẽ tỏa ra mùi naphtalen mà chuột, kiến, gián sợ nhất, theo bản năng ...

Naphthalene - WHO Guidelines for Indoor Air Quality ...

Naphthalene (CAS Registry Number 91-20-3; molecular formula C10H8) is a white crystalline powder with a characteristic odour (of mothballs). It is a two-ring aromatic hydrocarbon isolated from coal tar. Synonyms used are antimite, naphthalin, naphthaline, naphthene and tar camphor. Naphthalene is the most volatile polycyclic aromatic hydrocarbon (PAH) with a gas-phase part …

,Naphthalene ...

,Naphthalene,？ …

Naphthalene Structure, Properties & Melting Point | What ...

Naphthalene is an organic molecule that is primarily found in crude oil and is also present in coal tar, which is the byproduct of coke synthesis from coal. It is a component of cigarette smoke ...

naphthalene-2,6-diamine | CAS: | ...

naphthalene-2,6-diamine : YSZC1093 CAS No.: : C 10 H 10 N 2 : 158.19 : Gray solid, soluble in DMF : 2-8℃ HNMR COA ...

a-Naphthaleneacetic 25G - VINALAB JSC

a-Naphthaleneacetic 25G. Bán a-Naphthaleneacetic 25G xuất xứ hàng chính hãng được nhập khẩu và cung cấp bởi VINALAB JSC. Chi tiết liên hệ hotline: 0764999444 - Email: dam.hv@vinalabjsc

Máy ozone công nghiệp xử lý nước thải sản xuất

Chemsrc provides Naphthalene(CAS#:91-20-3) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of Naphthalene are included as well.

CDC - NIOSH Pocket Guide to Chemical Hazards - …

The following filters may also be used: N99, R99, P99, N100, R100, P100. Click here for information on selection of N, R, or P filters.*. (APF = 10) Any supplied-air respirator*. Up to 250 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*. (APF = 50) Any air-purifying full-facepiece respirator equipped with organic ...

Naphthalene poisoning: MedlinePlus Medical Encyclopedia

Naphthalene is a white solid substance with a strong smell. Poisoning from naphthalene destroys or changes red blood cells so they cannot carry oxygen. This can cause organ damage. This article is for information only. DO NOT use it to treat or manage an actual poison exposure. If you or someone you are with has an exposure, call your local ...

Naphthalene - NIST

Δ c H° solid (kJ/mol) Method Reference Comment-5150.09: Ccb: Balcan, Arzik, et al., 1996: Corresponding Δ f Hº solid = 71.67 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS-5153.9 ± 5.1: Ccb: Holdiness, 1983: Corresponding Δ f Hº solid = 75.48 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS-5165.5 ± 0.78

Naphthalene-fused octacyclic electron-donating central …

To develop new central core structure, we designed and synthesized a naphthalene-fused octacyclic electron-rich block, named as NITT.With the NITT ladder-type core and two distinct terminal groups (IC-2F and CPTCN-Cl), two novel A-D-A-type non-fullerene acceptors (NFAs), namely NITT-BF and NITT-ThCl, were constructed. ...

Sodium Naphthalene Formaldehyde(SNF), Trung Quốc, 25 ...

Nơi cung cấp hóa chất Sodium Naphthalene Formaldehyde uy tín, chất lượng SNF tại VIETCHEM ... NHÀ MÁY TÂN THÀNH Nhà máy hưng yên Đ/c: Văn Lâm - Hưng Yên Hotline: 0826 010 010 - 0963 029 988 Fax: 0221.3981162 Email: sales@hoachat ...

Naphthalene, 1-Methylnapthalene, 2-Methylnapthalene ...

1-Methylnaphthalene and 2-methylnaphthalene are naphthalene-related compounds. 1-Methylnaphthalene is a clear liquid and 2-methylnaphthalene is a solid; both can be smelled in air and in water at very low concentrations. 1-Methylnaphthalene and 2-methylnaphthalene are used to make other chemicals such as dyes and resins. 2-Methylnaphthalene is ...

Naphthalene: general information - GOV.UK

Naphthalene is a white, crystalline solid that is flammable and smells strongly of mothballs. Uses of naphthalene. Naphthalene is the most abundant component of coal tar, which is the liquid ...

Naphthalene Toxicity: Methemoglobinemia and Acute ...

Naphthalene poisoning is a rare form of toxicity that may occur after ingestion, inhalation, or dermal exposure to naphthalene-containing compounds such as mothballs. Clinically, patients present with acute onset of dark brown urine, watery diarrhea, and non-bloody bilious vomiting 48-96 hours after exposure. Vital sign abnormalities include ...

Material Safety Data Sheet Sodium Naphthalene …

Sodium salt of naphthalene sulfonate Polymerized with formaldehyde 3 >88.0 Sodium sulfate 231-820-9 5.0 water 231-791-2 6.0 Toxicological Data on Ingredients: LD50: 2000mg/kg(Rat) LC50: No information found Section 3: Hazards Identification Potential Acute Health Effects:

TOXICOLOGICAL PROFILE FOR NAPHTHALENE, 1 …

These experts collectively have knowledge of naphthalene, 1-methylnaphthalene, and 2-methyl­ naphthalene's physical and chemical properties, toxicokinetics, key health end points, mechanisms of action, human and animal exposure, and quantification of risk to humans. All reviewers were selected in

Naphthalene (Băng phiến) - Tính chất, công dụng & nguy ...

Naphthalene | C10H8 | CID 931 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety ...

Refractive index standard kit 3 1-Methyl …

Máy lắc 3 chiều Máy lắc trộn dạng trục quay Máy ly tâm Tủ thao tác PCR Thiết bị tuyển Tuyển từ Tuyển nổi Bể ổn nhiệt ( điều nhiệt ) Thiết bị lọc Lọc nước Lọc không khí Bể rửa siêu âm Lò nung Máy đập – nghiền Thiết bị Đo – Phân tích

sơ đồ trang web

 

Trụ sở chính

No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.

 

Trung tâm cuộc gọi

Phone1: 0086-21-58386256

Phone2: 0086-21-58386258

 

Email

[email protected]