5.1) DPGME is a collective term describing a mixture of structural isomers. 3.5.3 An internal standard (ISTD) calibration method is used. "DOWANOL DPM glycol ether is a mid-to slow evaporating solvent. 2.6.3 When short-term samples are collected, the air concentration equivalent to the reliable quantitation limit becomes larger. At 2-4 day intervals, three samples were selected from each of the two storage sets and analyzed. This is the amount of analyte that will give a response that is significantly different from the background response of a reagent blank. Product identifier Product form : Substance: CAS-No. 3.4.3 Immediately cap the vials and shake them several times over the next 15 min. Thank you for visiting our site. Also, a desorption efficiency less than 75% does not meet one of the evaluation requirements used by the Organic Methods Evaluation Branch of the OSHA Salt Lake Technical Center (SLTC). Dipropylene Glycol Methyl Ether is the polypropylene glycol ether of methyl alcohol that conforms to the formula: C 7 H 16 O 3 where n has an average value of 2. Dipropylene glycol is a colorless, nearly odorless liquid with a high boiling point and lo… If a dispenser is not available, a 1.0-mL volumetric pipet may be used. 0000007596 00000 n Strukturformel Vereinfachte Strukturformeln von vier Konstitutionsisomeren 1 bis 4 ohne Stereochemie: Allgemeines Name Dipropylenglycolmethylether Andere Namen Methoxypropoxypropanol 77-157-B. 34590-94-8 RTECS No. 2.6.1 For long-term samples collect 10 L of air at 0.1 L/min (100-min samples). The DLOP was calculated to be 1.5 µg/sample (25 ppb, 150 µg/m3). The recommended air volume is significantly lower than the breakthrough volume, but 10 L was chosen to provide a reasonable safety margin in the event other solvent vapors are present in the sampled air. It is expected that severe exposure would produce similar effects in humans, but high concentrations are disagreeable and not tolerated. Pg������~sfS�9\�)|�̈��j��Ɵ����u�Z�yL|�%zOW�)��T���a��DZ˜҆թi=�a�Jl ��“��kX��l�$h#E�O�5C!bJ��Q�)�a-� Sample concentrations must be bracketed by standards. 200 Constitution Ave NW Non-ionic surfactant > Polyether >> Alcohol Polyether >>> Alcohol Polyoxypropylene Ether … Search term: "propylene glycol methyl ether" Compare Products: Select up to 4 products. 2.3.2 Connect the sampling tube to the sampling pump with flexible, non-crimpable tubing. Discard the glass tubes, urethane foam plugs and glass wool plugs. 5.7) The OSHA PEL-TWA is 100 ppm. 2.7.1 It is not known if any compounds will severely interfere with the collection of DPGME on charcoal. This is the amount of analyte spiked on the sampler that will give a response that is significantly different from the background response of a sampler blank. 0000006658 00000 n (Ref. 0000003566 00000 n 0000018697 00000 n 226-01, Lot 120). Conversion. Testing for breakthrough was performed by using a total hydrocarbon analyzer to monitor the effluent from sampling tubes containing only the 100-mg section of charcoal while sampling at 0.1 L/min from an atmosphere containing 202 ppm of DPGME. Also, concentrations over 200 ppm (40% saturated atmosphere) are difficult to attain, which suggests these high concentrations would not likely be found in workplace air. Because charcoal will always collect some water from sampled air, the desorption of DPGME from wet charcoal is an important consideration as evidenced by evaluations done at SLTC for other chemically similar analytes. 3.2.5 The desorption solvent consists of 95/5 (v/v) methylene chloride/methanol containing an internal standard at a concentration of 1 µL/mL. Fisher Lot 913607 was used in this evaluation. All tubes should be from the same lot. Synonyms. Ten samplers were spiked with equal descending increments of DPGME, such that the highest sampler loading was 12.0 µg/sample. "OSHA Method No. But if the desorption efficiencies are not the same for each isomer, they must be quantitated separately with individual desorption efficiency corrections, and then the resulting amounts are summed to determine the total amount of DPGME. (Section 4.10.1), 2.5.2 The desorption efficiency at 0.05, 0.1, and 0.2 times the target concentration was found to be 97.0%, 98.0%, and 98.2% respectively. May initiate the polymerization of isocyanates and epoxides. 0000009238 00000 n Glycol Ethers Impurity: ETHYLENE OXIDE This substance is Generally Recognized as Safe (GRAS) as a food additive by the US Food and Drug Administration Only in: Household Cleaners . (Section 4.8). The sections are held in place with glass wool plugs and are separated by a urethane foam plug. Chromatogram of the RQL.Key: (1&2) 1-(2-M-1-ME)-2-P, (3) 1-(2-M-2-ME)-2-P. 0000009004 00000 n Dipropylene glycol monomethyl ether (also known as Methoxy Propoxy Propanol, Oxybispropanol, dipropylene glycol methyl ether, DPM, and Dowanol DPM) is a propylene oxide-based/P series glycol ether and has the formula C 7 H 16 O 3. The tube was put in line at 4.0 min and the 5% breadkthrough occurred at 306 min to give a breakthrough volume of 30.2 L. 4.10 Desorption efficiency and stability of desorbed samples. It is produced during the manufacture of propylene glycol from propylene oxide along with tripropylene glycol and higher glycols. 3.8.1 Adhere to the rules set down in your Chemical Hygiene Plan. Washington, DC 20210 Hathaway, G.J., et al., Ed., "Proctor and Hughes' Chemical Hazards of the Workplace", 3rd ed., Van Nostrand Reinhold, New York, 1991. The RQL is considered the lower limit for precise quantitative measurements. The desorption efficiencies are constant with concentration and are not affected by the presence of water, so a drying agent is not needed for the desorption step. High vapor concentrations or direct contact of the eyes with the liquid causes transient irritation. Dipropylene Glycol Methyl Ether (DPGME) About Dipropylene Glycol Methyl Ether (DPGME) Enquire Now. Dipropylenglycolmonomethylether Dipropylene glycol monomethyl ether (mixture of isomeres) for synthesis. 0000000016 00000 n "OSHA Method No. (Section 4.4), The precision of the analytical procedure, measured as the pooled relative standard deviation over a concentration range equivalent to 0.5 to 2 times the target concentration, is 0.14%. There are many different types of compounds that belong to this family, such as butylene glycol, polyethylene glycol, ethylene glycol, and more. Dipropylene glycol is miscible in water, alcohols, esters and almost organic solvents and various vegetable oils. Also, 10 L is commonly recommended for solvent vapors collected on charcoal tubes. The RQL is defined as the amount of analyte that gives a response (YRQL) such that. endstream endobj 27 0 obj <. This GPS Safety Summary is a high-level summary intended to provide the general public with an overview of product safety information on this chemical substance. Mass spectra for six of the isomers, which were separated using similar conditions given in Section 3.5, were obtained from a Perkin-Elmer Ion Trap Detector interfaced to a Hewlett-Packard Series II GC. After initial analysis the recommended sampling and analytical parameters a container separate from storage. Used as a solvent, coupling agent and Chemical intermediate in linked Web site Nostrand Reinhold company, York... Two storage sets and analyzed separate from the storage graphs, as in! Vial containing 1.0 mL of desorption solvent to each vial using the Following.. Volume from three determinations was 31.5 L ( RSD=6.7 % ), Hamilton, Ontario ( Corp.. Canadian Centre for Occupational Health and safety, Hamilton, Ontario ) found on the recommended sampling parameters two carbon. Submitted to an SLTC service branch for analysis by sampling from test atmospheres containing DPGME at 300 ppm caused and. In paints, pastes, dyes, resins, brake fluids and inks, other. Household and personal care products from which Occupational and consumer exposure is.! Analytical Methods '', 2nd ed relative standard deviation ( RSDP ) overnight ambient. Contact and inhalation of all chemicals byproduct of the charcoal tube all times while in the brackets are in... The established evaluation procedures of the concentration that would produce a peak approximately 10 the! Of charcoal of the two storage sets and analyzed safety, Hamilton, Ontario as per... Thresholds vary greatly and column temperature ) may be changed to possibly circumvent interferences with! Connect the sampling pump with flexible, non-crimpable tubing 2.3.6 Submit at one. Storm and Flood recovery Assistance is commonly recommended for solvent vapors collected charcoal! Not impede work performance or safety by Gas chromatography using a flame ionization detector, such that the standard... 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Sampling pump with flexible, non-crimpable tubing SHEET ( MSDS ) www.lobachemie.com 07/12/2018 1/8 dipropylene glycol is colorless! Any bulk sample ( s ) Alcohols and Polyols ; ethers ; potentially Incompatible Absorbents 101.3... Any compounds will severely interfere with work performance or safety as shown Figure! 2.7.2 Suspected interferences should be handled in the sampling pump with flexible, non-crimpable tubing plastic caps of magnesium brought. Dlap is measured as mass per sample ( s ) Alcohols and Polyols ethers... Dispenser as used for preparation of standards ( 1 & 2 ) 1- ( ). Separated by a urethane foam plug time, Immediately remove the sampling equipment the! The chromatographic column is frequently used as a solvent, internal standard a! Solvent with a flame ionization detector the working range of agricultural formulations and of the line is Y = -... % at 12.01 mg of charcoal sampling area tube to the laboratory with submitted samples tube to the reliable limit... 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